549388 SzGeCERN 20150211052821.0 oai:cds.cern.ch:549388 cerncds:FULLTEXT SLAC 4915259 Inspire 586059 hep-ph/0204323 eng Liang, Z Hyperon polarization in $\nu_{\mu}$ charged current interaction at the NOMAD energies 2002 28 Apr 2002 11 p We show that, in $\nu_\mu N\to \mu^-\Lambda X$ at the NOMAD energies, it is impossible to separate the products of the fragmentation of the struck quark from those of the nucleon remnant. The latter has a large contribution even in the current fragmentation region and has to be taken into account in calculating $\Lambda$ polarization using different pictures. Based on this, we make a rough estimation for the longitudinal $\Lambda$ polarization in $\nu_{\mu} N \to \mu^- \Lambda X$ at the NOMAD energies. A comparison with the data is given and predictions for $\nu_\mu N\to\mu^-\Sigma^+X$ are presented. CDS LANL EDS SIS:2002 PR/LKR added SIS LANLPUBL2002 SzGeCERN Particle Physics - Phenomenology ARTICLE CERN SPS NOMAD WA96 LANL EDS High Energy Physics - Phenomenology Liu, C Liang, Zuo-tang Liu, Chun-xiu 057302 Phys. Rev. D 66 2002 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0204323 Access to fulltext document http://cds.cern.ch/record/549388/files/0204323.pdf Access to fulltext document http://cds.cern.ch/record/549388/files/0204323.ps.gz Access to fulltext document liang@sdu.edu.cn Shandong U. Shandong U. & IHEP Bejing n 200218 13 20100419 1112 CER01 20020430 PUBLIC 002306862CER ARTICLE 549387 SzGeCERN 20170828004508.0 DOI 10.1103/PhysRevD.65.113012 oai:cds.cern.ch:549387 cerncds:FULLTEXT 2306861CERCER SLAC 4915240 SPIRES 4915240 Inspire 586058 oai:arXiv.org:hep-ph/0204322 http://export.arxiv.org/oai2 2015-06-25 2015-06-26T08:58:58Z true arXiv hep-ph/0204322 eng Liang, Z Hyperon polarization in e^-p --> e^-HK with polarized electron beams 2002 28 Apr 2002 15 p Comments: 15 pages, 2 figures. submitted to Phys. Rev. D arXiv We apply the picture proposed in a recent Letter for transverse hyperon polarization in unpolarized hadron-hadron collisions to the exclusive process e^-p --> e^-HK such as e^-p-->e^-\Lambda K^+, e^-p --> e^-\Sigma^+ K^0, or e^-p--> e^-\Sigma^0 K^+, or the similar process e^-p\to e^-n\pi^+ with longitudinally polarized electron beams. We present the predictions for the longitudinal polarizations of the hyperons or neutron in these reactions, which can be used as further tests of the picture. LANL EDS SIS LANLPUBL2002 SIS:2002 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Xu, Q Liang, Zuo-tang Xu, Qing-hua 113012 Phys. Rev. D 65 2002 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0204322 Access to fulltext document http://cds.cern.ch/record/549387/files/0204322.pdf Access to fulltext document http://cds.cern.ch/record/549387/files/0204322.ps.gz Access to fulltext document liang@sdu.edu.cn Shandong U. n 200218 13 20100419 0938 CER01 20020430 PUBLIC 002306861CER ARTICLE Hidden 536811 SzGeCERN 20180924172303.0 oai:cds.cern.ch:536811 cerncds:CERN 10.1016/S0375-9474(01)01161-7 DOI CERN annual report 2002-3.1177 INSPEC 7072959 SPIRES 4776461 Inspire 566455 eng Popov, B A CERN AUTHOR|(CDS)2074109 #BEARD# Measurement of the $\Lambda$ hyperon polarization in $\nu_{\mu}$ charged current interactions in the NOMAD experiment 2001 Geneva CERN 2001 The Lambda hyperon polarization in nu /sub mu / charged current interactions has been measured in the NOMAD experiment. The event sample (8087 reconstructed Lambda 's) is more than an order of magnitude larger than that of previous bubble chamber experiments, while the quality of the event reconstruction is comparable. We observe a negative polarization along the W-boson direction which is enhanced in the target fragmentation region: P/sub x/(x/sub F/<0) =-0.21+or-0.04(stat)+or-0.02(sys). In the current fragmentation region we find P/sub x/(x/sub F/>0)=-0.09+or-0.06(stat)+or-0.03(sys). These results provide a test of different models describing the nucleon spin composition and the spin transfer mechanisms. We also observe a significant transverse polarization (in the direction orthogonal to the Lambda production plane) for the first time in a neutrino experiment: P/sub y/=-0.22+or-0.03(stat)+or-0.01(sys). The dependence of the absolute value of P/sub y/ on the Lambda transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments. The dependence of the Lambda polarization on the type of target nucleon in nu /sub mu / scattering has been also studied. (11 refs). SIS INSP2002 7072959 SzGeCERN Particle Physics - Experiment ARTICLE CERN CERN SPS NOMAD WA96 INSPEC A1315 (Neutrino interactions) INSPEC A1460G (Neutrinos) INSPEC A1388 (Polarization in elementary particle interactions and scattering) INSPEC A1230 (Models of weak interactions) INSPEC A1387 (Jets in large-Q/sup 2 elementary particle interactions) INSPEC A1420J (Hyperons and hyperon resonances) INSPEC charged-currents INSPEC elementary-particle-jets INSPEC hyperon-production INSPEC hyperon-spin INSPEC lambda-baryons INSPEC neutrino-interactions INSPEC neutrino-oscillations INSPEC polarisation-in-elementary-particle-interactions NOMAD Collaboration EP 73-80 1-2 Nucl. Phys. A 692 2001 h 200252 a2002 13 20101108 1209 CER01 20020204 PUBLIC 002293889CER ARTICLE 516889 SzGeCERN KNWLD9 2272824CERCER INSPEC 6989009 chi Liu Chun Xiu Spin transfer in high-energy hadronization processes and polarization of hyperon in the lepton-induced reactions 2001 We show that measuring the polarization of the hyperon in the lepton induced reactions is an ideal way to study the spin transfer in high- energy hadronization processes. After a brief summary of the polarization of the initial quark or antiquark in these reactions, we give the calculation method of the polarization of the hyperon. As an example, we calculate polarizations of different hyperons in e/sup + /e/sup -/ annihilation at LEP energies and compare these results with the available data. The results show that measurements of such polarizations should provide important information about the question of which picture of spin structure of baryon is more suitable in describing the spin effects in the high-energy fragmentation processes. (17 refs). SIS INSP2001 6989009 SzGeCERN Particle Physics - Phenomenology ARTICLE INSPEC A1365 (Hadron production by electron-positron collisions) INSPEC A1388 (Polarization in elementary particle interactions and scattering) INSPEC A1420J (Hyperons and hyperon resonances) INSPEC electron-positron-interactions INSPEC hadron-electroproduction INSPEC hyperon-production INSPEC hyperon-spin INSPEC polarisation-in-elementary-particle-interactions Liang Zuo Tang 476-86 6 High Energy Phys. Nucl. Phys. (Beijing) 25 2001 Dept of Phys h 200152 13 20070124 1255 CER01 20010910 PUBLIC 002272824CER ARTICLE 504920 SzGeCERN 20170828004057.0 oai:cds.cern.ch:504920 cerncds:FULLTEXT 2260202CERCER SLAC 4659546 SPIRES 4659546 Inspire 558577 hep-ph/0106184 eng Liu, C Hyperon polarization in semi-inclusive deeply inelastic lepton-nucleon scattering at high energy 2001 We calculate the polarizations for different octet hyperons produced in the current fragmentation regions of the deeply inelastic lepton-nucleon scatterings $\mu^-N \to \mu^- HX$ and $\nu_{\mu} N \to \mu^- HX$ at high energy using different models for spin transfer in fragmentation processes. The results show that measurements of those hyperon polarizations should provide useful information to distinguish between different models in particular the SU(6) and the DIS pictures used frequently in the literature. We found, in particular, that measuring the polarization of $\Sigma^+$ produced in these processes can give a better test to the validity of the different spin transfer models. LANL EDS SIS LANLPUBL2002 SIS:2002 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Xu, Q Liang, Z Liu, Chun-xiu Xu, Qing-hua Liang, Zuo-tang 073004 Phys. Rev. D 64 2001 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0106184 Access to fulltext document http://cds.cern.ch/record/504920/files/0106184.pdf Access to fulltext document http://cds.cern.ch/record/504920/files/0106184.ps.gz Access to fulltext document liang@sdu.edu.cn Shandong U. n 200125 13 20100420 1350 CER01 20010619 PUBLIC 002260202CER ARTICLE Hidden 782505 SzGeCERN 20190328161058.0 INIS 34045065 eng Maggiora, M Spin observables in hyperon production 2000 The first exclusive measurements of the spin transfer parameter D sub N sub N in the reaction p-vectorp->pK sup +LAMBDA-vector has been performed at Saturne with the polarized beam and with the DISTO spectrometer. The results suggest an OBE mechanism dominated by kaon exchange. SIS INIS2004 Spin observables in hyperon production SzGeCERN Nuclear Physics ARTICLE INIS Nuclear physics and radiation physics INIS charge-exchange-reactions INIS electron-transfer INIS hyperon-reactions INIS kaon-beams INIS nuclear-reactions INIS obe-model INIS polarized-beams INIS quantum-mechanics INIS saturne- INIS spectrometers- INIS spin-exchange INIS spin-orientation INIS accelerators- INIS baryon-reactions INIS beams- INIS boson-exchange-models INIS cyclic-accelerators INIS hadron-reactions INIS mathematical-models INIS measuring-instruments INIS mechanics- INIS meson-beams INIS orientation- INIS particle-beams INIS particle-models INIS peripheral-models INIS synchrotrons- Balestra, F Bedfer, Y Bertini, R Bland, L C Brochard, F Bussa, M P Chalyshev, V Choi, S AUTHOR|(CDS)2071583 #BEARD# Debowski, M Dzemidzic, M Faivre, Jean-Claude Falomkin, I V Fava, L Ferrero, L Foryciarz, J Frolov, V Fröhlich, I Garfagnini, R Gill, D Grasso, A Heinz, S Ivanov, V V Jacobs, W W Kühn, W Maggiora, A Manara, A Panzieri, D Pfaff, H W Piragino, G Pontecorvo, G B Popov, A Ritman, J Salabura, P Tosello, F AUTHOR|(CDS)2069250 #BEARD# Vigdor, S E Zosi, G 477c-480c 1-2 Nucl. Phys. A 663-664 2000 n 200431 13 20090227 0924 CER01 20040729 PUBLIC 002472845CER ARTICLE hidden 733005 SzGeCERN 20040617123221.0 SLAC 5727685 eng DESY-HERMES-2001-70 Belostotskii, S L Longitudinal spin transfer to the Lambda hyperon in leptoproduction 2001 Hamburg DESY Aug 2001 12 p No authors SIS DESY2004 SzGeCERN XX PREPRINT DESY HERA HERMES HERMES Collaboration St. Petersburg, INP n 200418 11 20101109 0940 CER01 20040430 PUBLIC 002445274CER PREPRINT http://www-hermes.desy.de/notes/pub/doc-public-index.html#2001 Fulltext from DESY 627493 SzGeCERN 20040510105002.0 DESY 5547830 eng DESY-HERMES-2003-09 Chiang Huan Ching Lambda hyperon production mechanisms and longitudinal spin transfer at HERMES 2003 Hamburg DESY 2003 50 p SIS DESY2003 SzGeCERN XX PREPRINT DESY HERA HERMES Illinois Univ., Urbana n 200327 11 20060206 1933 CER01 20030708 PUBLIC 002385838CER PREPRINT 576187 SzGeCERN 20170920235357.0 oai:cds.cern.ch:576187 cerncds:FULLTEXT CERCER 2334565 SPIRES 5038642 Inspire 592718 hep-lat/0208017 eng DESY-02-100 DESY-2002-100 EDINBURGH-2002-05 LU-ITP-2002-014 Göckeler, M A lattice study of the spin structure of the Lambda hyperon 2002 Hamburg DESY 13 Aug 2002 14 p The internal spin structure of the Lambda is of special importance for the understanding of the spin structure of hadrons in general. The comparison between the nucleon and Lambda allows for a test of the relevant flavour-symmetry breaking effects. Using nonperturbatively O(a) improved Wilson fermions in the quenched approximation we have calculated the first moments of the unpolarised, longitudinally polarised and transversity quark distribution functions in the Lambda. The results indicate that flavour symmetry breaking has little effect on the internal spin structure, in accordance with model based expectations. LANL EDS SIS LANLPUBL2003 SIS:2003 PR/LKR added SzGeCERN Particle Physics - Lattice ARTICLE LANL EDS High Energy Physics - Lattice Horsley, R Pleiter, D Rakow, P E L Schäfer, S Schäfer, A Schierholz, G 112-118 Phys. Lett. B 545 2002 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-lat&id=0208017 Access to fulltext document http://cds.cern.ch/record/576187/files/0208017.pdf Access to fulltext document http://cds.cern.ch/record/576187/files/0208017.ps.gz Access to fulltext document andreas.schaefer@physik.uni-regensburg.de n 200233 13 20100419 0935 CER01 20020814 PUBLIC 002334565CER ARTICLE Hidden 522893 SzGeCERN 20170920233553.0 oai:cds.cern.ch:522893 cerncds:FULLTEXT 2279610CERCER SPIRES 4744683 Inspire 564206 hep-lat/0110057 eng DESY-2001-144 DESY-01-144 Göckeler, M The spin structure of the Lambda hyperon in quenched lattice QCD 2002 Hamburg DESY 12 Oct 2001 3 p It has been suggested to use the production of Lambda hyperons for investigating the nucleon spin structure. The viability of this idea depends crucially on the spin structure of the Lambda. Using nonperturbatively O(a) improved Wilson fermions in the quenched approximation we have studied matrix elements of two-quark operators in the Lambda. We present results for the axial vector current, which give us the contributions of the u, d, and s quarks to the Lambda spin. LANL EDS SIS LANLPUBL2002 SIS:2002 PR/LKR added SzGeCERN Particle Physics - Lattice ARTICLE LANL EDS High Energy Physics - Lattice Horsley, R Pleiter, D Rakow, P E L Schäfer, S Schäfer, A Schierholz, G 305-307 Nucl. Phys. B, Proc. Suppl. 106 2002 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-lat&id=0110057 Access to fulltext document http://cds.cern.ch/record/522893/files/0110057.pdf Access to fulltext document http://cds.cern.ch/record/522893/files/0110057.ps.gz Access to fulltext document meinulf.goeckeler@physik.uni-regensburg.de n 200142 13 20100420 1348 CER01 20011015 PUBLIC 002279610CER ARTICLE Hidden 732981 SzGeCERN 20040617123510.0 SLAC 5727944 eng DESY-HERMES-99-54 Belostotskii, S L Lambda polarization measured at HERMES and Lambda spin structure 1999 Hamburg DESY Sep 1999 6 p No authors SIS DESY2004 SzGeCERN XX PREPRINT DESY HERA HERMES Grebenyuk, O HERMES Collaboration St. Petersburg, INP n 200418 11 20101109 0940 CER01 20040430 PUBLIC 002445250CER PREPRINT http://www-hermes.desy.de/notes/pub/doc-public-index.html#1999 Fulltext from DESY 510152 SzGeCERN 20170828004127.0 oai:cds.cern.ch:510152 cerncds:FULLTEXT 2265777CERCER SLAC 4686160 SPIRES 4686160 Inspire 560360 hep-ph/0107222 eng USM-TH-109 Yang Jian Jun Up and Down Quark Contributions to Spin Content of Lambda from Fragmentation 2001 Valparadíso Santa Maria Univ. Dept. Fís. 20 Jul 2001 14 p We check the $u$ and $d$ quark contributions to the spin content of the $\Lambda$ by means of the $q\to\Lambda$ fragmentation and find that the $u$ and $d$ quarks of the $\Lambda$ are likely positively polarized. The parton distributions in the $\Lambda$ are given by a successful statistical model which can reproduce and correlate a vast body of polarized and unpolarized structure function and parton distribution data of the nucleon. With the Gribov-Lipatov relation between the quark distributions and fragmentation functions, the longitudinal spin transfer for the $\Lambda$ production in the polarized charged lepton deep inelastic scattering (DIS) process and the $\Lambda$-polarization in the neutrino (antineutrino) DIS process are predicted. The available experimental data suggests that the $u$ and $d$ quark contributions to the spin of the $\Lambda$ are positive. In addition, our results provide a collateral evidence for the SU(3) symmetry breaking in hyperon semileptonic decays of the octet baryons, which is very important for a deeper understanding of the proton 'spin crisis'. LANL EDS SIS LANLPUBL2002 SIS:2002 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Yang, Jian-Jun 57-64 Phys. Lett. B 512 2001 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0107222 Access to fulltext document http://cds.cern.ch/record/510152/files/0107222.pdf Access to fulltext document http://cds.cern.ch/record/510152/files/0107222.ps.gz Access to fulltext document jjyang@fis.utfsm.cl Santa Maria U. & Nanjing Normal U. n 200130 13 20100420 1349 CER01 20010723 PUBLIC 002265777CER ARTICLE Hidden 498370 SzGeCERN PROQUEST DAI-B61/06p3100Dec2000 2253240CERCER eng Sutter, M F A Study Of Spin Transfer In Deep Inelastic Fragmentation In Leptoproduction Of The Lambda Cambridge, MA MIT 2000 mult. p Not held by the CERN library PhD Massachusetts Inst. Technol. 2000 A measurement of the spin transfer in deep inelastic fragmentation to the &Lambda; is presented. Data were accumulated by the HERMES experiment in 1996 and 1997 using unpolarized gas targets internal to the 27.6 GeV polarized HERA positron beam. At an average &Lambda; energy of z = 0.45 the spin transfer is 0.11 ± 0.17 (stat.) ± 0.03 (sys.). In the model that the measured spin transfer is approximately equal to the spin of the u quark in the &Lambda;, this measurement consistent with both the naive quark parton model prediction of zero polarization of u quarks in the &Lambda; and the Burkardt-Jaffe prediction of a &ndash;0.20 u quark polarization contribution. (Copies available exclusively from MIT Libraries, Rm. 14-0551, Cambridge, MA 02139-4307. Ph. 617-253-5668; Fax 617-253- 1690.) SIS PROQUEST2001 SzGeCERN Particle Physics THESIS PROQUEST Physics, Atomic (0748) Milner, R dir. n 200117 29 20070331 0010 CER01 20010504 PUBLIC 002253240CER DUMMY THESIS 733006 SzGeCERN 20040617123307.0 SLAC 5727677 eng DESY-HERMES-2001-71 Belostotskii, S L Transverse polarization of Lambda hyperons produced inclusively in e N scattering at HERMES 2001 Hamburg DESY Aug 2001 4 p No authors SIS DESY2004 SzGeCERN XX PREPRINT DESY HERA HERMES Grebenyuk, O HERMES Collaboration St. Petersburg, INP n 200418 11 20101109 0940 CER01 20040430 PUBLIC 002445275CER PREPRINT http://www-hermes.desy.de/notes/pub/doc-public-index.html#2001 Fulltext from DESY 732977 SzGeCERN SLAC 5727987 eng DESY-HERMES-99-37 Schnell, G Longitudinal polarization of the Lambda in deep inelastic scattering of polarized positrons from nucleons 1999 Hamburg DESY May 1999 166 p SIS DESY2004 SzGeCERN XX PREPRINT http://www-hermes.desy.de/notes/pub/doc-public-index.html#1999 Fulltext from DESY New Mexico State Univ. n 200418 11 20060211 0014 CER01 20040430 PUBLIC 002445246CER PREPRINT 720305 SzGeCERN 20171106225326.0 DOI 10.1103/PhysRevC.71.065209 oai:cds.cern.ch:720305 cerncds:FULLTEXT SPIRES 5810574 oai:arXiv.org:nucl-ex/0402024 http://export.arxiv.org/oai2 2014-11-18 2014-11-19T06:23:25Z arXiv true arXiv Inspire 645336 nucl-ex/0402024 eng Raue, Brian A Ohio U. Florida International U. Ratio of $\sigma_L / \sigma_T$ for $p(e,e'K^+)\Lambda$ Extracted from Polarization Transfer 2004 2004 mult. p Comments: 14 pages, 4 figures The ratio of longitudinal to transverse structure functions, $\sigma_L/\sigma_T$, has been extracted from recent beam-recoil transferred polarization data for the $p(\vec e,e'K^+)\vec\Lambda$ reaction. Results have been obtained for $W$=1.69, 1.84, and 2.03 GeV at an average $Q^2$ of 0.69 GeV$^2$. Our results indicate a ratio approaching zero. This is in contradiction to previously published results using a Rosenbluth separation. A similar difference between Rosenbluth and recoil polarization results has been observed in the measurement of the ratio of electric to magnetic form factors of the proton, $\mu_pG_E/G_M$. LANL EDS SzGeCERN Nuclear Physics PREPRINT LANL EDS Nuclear Experiment Phys.Rev.C 71 2005 065209 Phys.Rev.C71:065209,2005 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=nucl-ex&id=0402024 Access to fulltext document http://cds.cern.ch/record/720305/files/0402024.pdf Access to fulltext document n 200410 11 20101108 1210 CER01 20040301 PUBLIC 002434577CER PREPRINT Hidden 627480 SzGeCERN 20040519125727.0 DESY 5556597 eng DESY-HERMES-2002-51 Brüll, A Transverse polarization of Lambda and Antilambda hyperons in quasi-real photon nucleon scattering 2002 Hamburg DESY 2002 5 p SIS DESY2003 giva a faire SzGeCERN XX PREPRINT PREPRINT DESY HERA HERMES HERMES Collaboration MIT n 200327 11 20101109 0940 CER01 20030708 PUBLIC 002385825CER PREPRINT 623643 SzGeCERN 20240510210100.0 DOI 10.1140/epjc/s2002-01025-2 oai:cds.cern.ch:623643 cerncds:CERN CERN annual report 2003-3.0697 SPIRES 4907485 Inspire 585538 eng AUTHOR|(CDS)2108556 #BEARD# Ellis, Jonathan Richard Intrinsic polarized strangeness and $\Lambda^{0}$ polarization in deep-inelastic production 2002 We propose a model for the longitudinal polarization of Lambda /sup 0 / baryons produced in deep-inelastic lepton scattering at any x/sub F /, based on static SU(6) quark-diquark wave functions and polarized intrinsic strangeness in the nucleon associated with individual valence quarks. The free parameters of the model are fixed by fitting NOMAD data on the longitudinal polarization of Lambda /sup 0/ hyperons in neutrino collisions. Our model correctly reproduces the observed dependences of the Lambda /sup 0/ polarization on the kinematic variables. Within the context of our model, the NOMAD data imply that the intrinsic strangeness associated with a valence quark has anticorrelated polarization. We also compare our model predictions with results from the HERMES and E665 experiments using charged leptons. Predictions of our model for the COMPASS experiment are also presented. (42 refs). SIS INSP2003 7512541 SzGeCERN Particle Physics - Phenomenology ARTICLE CERN CERN SPS NOMAD WA96 CERN SPS COMPASS NA58 INSPEC A2470 (Polarization in nuclear reactions and scattering) INSPEC A2530G (Neutrino reactions and scattering) INSPEC deep-inelastic-scattering INSPEC lambda-baryons INSPEC neutrino-nucleus- reactions INSPEC polarisation-in-nuclear-reactions-and-scattering INSPEC SU-6- theory INSPEC wave-functions Kotzinian, A M Naumov, D V EP 603-13 4 Eur. Phys. J. C 25 2002 CERN n 200350 a2003 13 20100901 1606 CER01 20030522 PUBLIC 002376650CER 547521 ARTICLE DELETED 603715 SzGeCERN 20161219120259.0 DOI 10.5170/CERN-2004-011.130 oai:cds.cern.ch:603715 cerncds:FULLTEXT DOI cerncds:CERN:FULLTEXT INIS cerncds:CERN 2362859CERCER SLAC 5465478 SPIRES 5465478 Inspire 612721 hep-ph/0302008 eng Anselmino, M Transversity and Lambda polarization 2004 CERN 2 Feb 2003 7 p Two related issues are discussed, which might be easily explored by present and future COMPASS experiments. The first one deals with the new world of transversity, the fundamental polarized parton distribution so far totally unknown. The second issue concerns Lambda production in polarized semi-inclusive processes, with a measurement of the Lambda polarization, which might give novel information on distribution and fragmentation properties of polarized partons. In case of transverse polarization the detection of Lambda's gives access to a new way of measuring transversities. Also the interesting case of Lambda polarization in unpolarized processes is discussed. LANL EDS SzGeCERN Particle Physics - Phenomenology ARTICLE YELLOWREPCONTRIB CERN LANL EDS High Energy Physics - Phenomenology Anselmino, Mauro http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0302008 Fulltext http://documents.cern.ch/cgi-bin/setlink?base=yellowarticle&categ=2004-011&id=p130 Published version from CERN http://cds.cern.ch/record/603715/files/0302008.pdf Fulltext http://cds.cern.ch/record/603715/files/0302008.ps.gz Fulltext http://cds.cern.ch/record/603715/files/p130.pdf Published version from CERN mauro.anselmino@to.infn.it n 200306 13 20100417 1148 CER01 20030204 585520 130 cern20020926 PUBLIC 002362859CER ARTICLE ConferencePaper 595577 SzGeCERN 20171121220907.0 2354580CERCER SLAC 5412536 SPIRES 5412536 Inspire 604093 hep-ex/0212014 eng Carman, D S First Measurement of Transferred Polarization in the Exclusive e p --> e' K+ Lambda Reaction 2003 6 Dec 2002 6 p The first measurements of the transferred polarization for the exclusive ep --> e'K+ Lambda reaction have been performed in Hall B at the Thomas Jefferson National Accelerator Facility using the CLAS spectrometer. A 2.567 GeV electron beam was used to measure the hyperon polarization over a range of Q2 from 0.3 to 1.5 (GeV/c)2, W from 1.6 to 2.15 GeV, and over the full center-of-mass angular range of the K+ meson. Comparison with predictions of hadrodynamic models indicates strong sensitivity to the underlying resonance contributions. A non-relativistic quark model interpretation of our data suggests that the s-sbar quark pair is produced with spins predominantly anti-aligned. Implications for the validity of the widely used 3P0 quark-pair creation operator are discussed. LANL EDS SIS LANLPUBL2004 SIS:2004 PR/LKR added SzGeCERN Particle Physics - Experiment ARTICLE LANL EDS High Energy Physics - Experiment CLAS Collaboration 131804 Phys. Rev. Lett. 90 2003 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ex&id=0212014 Access to fulltext document carman@carman1.phy.ohiou.edu n 200250 13 20100420 0902 CER01 20021209 PUBLIC 002354580CER ARTICLE Hidden 560709 SzGeCERN 20200828100526.0 DOI 10.1063/1.1413167 oai:cds.cern.ch:560709 cerncds:CERN CERN annual report 2002-3.0007 Inspire 543599 eng Kotzinian, A M CERN $\Lambda$ polarization in the target fragmentation region of SIDIS 2001 SIS AIP_ART2005 SIS:2005 PR/LKR added SzGeCERN Particle Physics - Experiment SzGeCERN Particle Physics - Phenomenology ARTICLE CERN DESY HERA HERMES EP 272-276 AIP Conf. Proc. 588 2001 h 200225 a2002 13 20101108 1210 CER01 20020618 442503 272-276 cambridge20000914 PUBLIC 002318449CER ARTICLE ConferencePaper 557558 SzGeCERN 20230314190255.0 oai:cds.cern.ch:557558 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN cerncds:hep-ph CERN annual report 2004-3.0897 SPIRES 4957300 Inspire 587862 arXiv hep-ph/0206032 hep-ph eng Naumov, Dmitry V. Measurement of Lambda and Lambda-bar polarization in muon neutrino charged current interactions in NOMAD Charge Current 2002 Annecy-le-Vieux Lab. Annecy Phys. Part. 4 Jun 2002 5 p The Lambda and Lambda-bar polarizations in muon neutrino charged current interactions have been measured in the NOMAD experiment. The event sample (8087 reconstructed Lambda's and 649 Lambda-bar's) is more than an order of magnitude larger than that of previous bubble chamber experiments, while the quality of event reconstruction is comparable. For the Lambda hyperons we observe negative polarization along the W-boson direction which is enhanced in the target fragmentation region: Px(xF < 0) = -0.21 +- 0.04 (stat) +- 0.02 (sys). In the current fragmentation region we find Px(xF > 0) = -0.09 +- 0.06 (stat) +- 0.03(sys). A significant transverse polarization (in the direction orthogonal to the Lambda production plane) has been observed for the first time in a neutrino experiment: Py = -0.22 +- 0.03 (stat) +- 0.01 (sys). The dependence of the absolute value of Py on the Lambda transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments. The polarization vector of Lambda-bar hyperons measured for the first time in neutrino interactions is found to be consistent with zero. The Lambda and Lambda-bar polarizations in muon neutrino charged current interactions have been measured in the NOMAD experiment. The event sample (8087 reconstructed Lambda's and 649 Lambda-bar's) is more than an order of magnitude larger than that of previous bubble chamber experiments, while the quality of event reconstruction is comparable. For the Lambda hyperons we observe negative polarization along the W-boson direction which is enhanced in the target fragmentation region: Px(xF < 0) = -0.21 +- 0.04 (stat) +- 0.02 (sys). In the current fragmentation region we find Px(xF > 0) = -0.09 +- 0.06 (stat) +- 0.03(sys). A significant transverse polarization (in the direction orthogonal to the Lambda production plane) has been observed for the first time in a neutrino experiment: Py = -0.22 +- 0.03 (stat) +- 0.01 (sys). The dependence of the absolute value of Py on the Lambda transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments. The polarization vector of Lambda-bar hyperons measured for the first time in neutrino interactions is found to be consistent with zero. The Lambda and Lambda-bar polarizations in muon neutrino charged current interactions have been measured in the NOMAD experiment. The event sample (8087 reconstructed Lambda's and 649 Lambda-bar's) is more than an order of magnitude larger than that of previous bubble chamber experiments, while the quality of event reconstruction is comparable. For the Lambda hyperons we observe negative polarization along the W-boson direction which is enhanced in the target fragmentation region: Px(xF < 0) = -0.21 +- 0.04 (stat) +- 0.02 (sys). In the current fragmentation region we find Px(xF > 0) = -0.09 +- 0.06 (stat) +- 0.03(sys). A significant transverse polarization (in the direction orthogonal to the Lambda production plane) has been observed for the first time in a neutrino experiment: Py = -0.22 +- 0.03 (stat) +- 0.01 (sys). The dependence of the absolute value of Py on the Lambda transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments. The polarization vector of Lambda-bar hyperons measured for the first time in neutrino interactions is found to be consistent with zero. Inspire LANL EDS no affiliation SIS:2002 PR/LKR added SIS LANLPUBL2002 SzGeCERN Particle Physics - Phenomenology ARTICLE CERN CERN SPS NOMAD WA96 LANL EDS High Energy Physics - Phenomenology EP NOMAD Collaboration Naumov, Dmitry V. 3791-3796 Acta Phys. Pol. B 33 2002 http://th-www.if.uj.edu.pl/acta/vol33/abs/v33p3791.htm Acta Physica Polonica Server 2435619 92134 http://cds.cern.ch/record/557558/files/arXiv:hep-ph_0206032.pdf 1339954 165479 http://cds.cern.ch/record/557558/files/v33p3791.pdf Fulltext 61635 144771 http://cds.cern.ch/record/557558/files/0206032.pdf Access to fulltext document 61635 43141 http://cds.cern.ch/record/557558/files/0206032.ps.gz Access to fulltext document naumov@lapp.in2p3.fr n 200223 a2004 13 20100719 1154 CER01 20020605 527953 3791-3796 krakow20020430 PUBLIC 002315162CER ARTICLE ConferencePaper 557557 SzGeCERN 20170828004540.0 oai:cds.cern.ch:557557 cerncds:FULLTEXT 2315161CERCER SPIRES 4957296 Inspire 587861 hep-ph/0206031 eng Naumov, D V Lambda Polarization in Deep-Inelastic Production 2002 Annecy-le-Vieux Lab. Annecy Phys. Part. 4 Jun 2002 5 p We propose a model for the longitudinal polarization of Lambda baryons produced in deep-inelastic lepton scattering at any xF, based on static SU(6) quark-diquark wave functions and polarized intrinsic strangeness in the nucleon associated with individual valence quarks. Free parameters of the model are fixed by fitting the NOMAD data on the longitudinal polarization of Lambda hyperons in neutrino interactions. Our model correctly reproduces the observed dependences of Lambda polarization on the kinematic variables. Within the context of our model, the NOMAD data imply that the intrinsic strangeness associated with a valence quark has anticorrelated polarization. We also compare our model predictions with results from the HERMES and E665 experiments using charged leptons. Predictions of our model for the COMPASS experiment are also presented. LANL EDS SIS LANLPUBL2002 SIS:2002 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Naumov, Dmitry V. 3803-3808 Acta Phys. Pol. B 33 2002 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0206031 Access to fulltext document http://cds.cern.ch/record/557557/files/0206031.pdf Access to fulltext document http://cds.cern.ch/record/557557/files/0206031.ps.gz Access to fulltext document naumov@lapp.in2p3.fr n 200223 13 20100419 0937 CER01 20020605 527953 krakow20020430 PUBLIC 002315161CER ARTICLE Hidden 547521 SzGeCERN 20240511212719.0 oai:cds.cern.ch:547521 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:hep-ph cerncds:CERN DOI 10.1140/epjc/s2002-01025-2 CERN annual report 2003-3.0697 CERN annual report 2004-3.0750 Inspire 585538 arXiv hep-ph/0204206 hep-ph CERN-TH-2002-080 eng CERN Library TH-2002-079 CERN-TH-2002-080 Ellis, John R. INSPIRE-00146525 CERN Intrinsic Polarized Strangeness and Lambda Polarization in Deep-Inelastic Production 2002 Geneva CERN 17 Apr 2002 23 p 23 p paper We propose a model for the longitudinal polarization of Lambda baryons produced in deep-inelastic lepton scattering at any xF, based on static SU(6) quark-diquark wave functions and polarized intrinsic strangeness in the nucleon associated with individual valence quarks. Free parameters of the model are fixed by fitting NOMAD data on the longitudinal polarization of Lambda hyperons in neutrino collisions. Our model correctly reproduces the observed dependences of Lambda polarization on the kinematic variables. Within the context of our model, the NOMAD data imply that the intrinsic strangeness associated with a valence quark has anticorrelated polarization. We also compare our model predictions with results from the HERMES and E665 experiments using charged leptons. Predictions of our model for the COMPASS experiment are also presented. We propose a model for the longitudinal polarization of Lambda baryons produced in deep-inelastic lepton scattering at any xF, based on static SU(6) quark-diquark wave functions and polarized intrinsic strangeness in the nucleon associated with individual valence quarks. Free parameters of the model are fixed by fitting NOMAD data on the longitudinal polarization of Lambda hyperons in neutrino collisions. Our model correctly reproduces the observed dependences of Lambda polarization on the kinematic variables. Within the context of our model, the NOMAD data imply that the intrinsic strangeness associated with a valence quark has anticorrelated polarization. We also compare our model predictions with results from the HERMES and E665 experiments using charged leptons. Predictions of our model for the COMPASS experiment are also presented. Inspire CERN-TH LANL EDS OA SIS:2004 PR/LKR added SIS LANLPUBL2004 SzGeCERN Particle Physics - Phenomenology ARTICLE CERN CERN SPS NOMAD WA96 CERN SPS COMPASS NA58 LANL EDS High Energy Physics - Phenomenology INSPEC deep-inelastic-scattering INSPEC lambda-baryons INSPEC neutrino-nucleus- reactions INSPEC polarisation-in-nuclear-reactions-and-scattering INSPEC SU-6- theory INSPEC wave-functions Kotzinian, Aram Yerevan Phys. Inst. Dubna, JINR Naumov, Dmitry V. Dubna, JINR TH EP Ellis, John Kotzinian, Aram Naumov, Dmitry V. 603-613 4 Eur. Phys. J. C 25 2002 CERN ARC Library CERN-TH-2002-080 http://weblib.cern.ch/abstract?CERN-TH-2002-080 Preprint 2529823 338300 http://cds.cern.ch/record/547521/files/arXiv:hep-ph_0204206.pdf 96644 239354 http://cds.cern.ch/record/547521/files/0204206.ps.gz Access to fulltext document 96644 440684 http://cds.cern.ch/record/547521/files/0204206.pdf Access to fulltext document naumov@thsun1.jinr.ru Dubna Yerevan Phys. Inst. CERN n 200216 a2004 13 20100419 0939 CER01 20020418 PUBLIC 0001 002304901CER ARTICLE 623643 535101 SzGeCERN 20170828004356.0 oai:cds.cern.ch:535101 cerncds:FULLTEXT 2292145CERCER SLAC 4824881 SPIRES 4824881 Inspire 581616 hep-ph/0201076 eng Anselmino, M Transverse Lambda polarization in inclusive processes 2003 10 Jan 2002 8 p A formalism proposed to study transverse Lambda polarization in unpolarized hadronic processes, based on a generalized pQCD factorization theorem, is extended to semi-inclusive DIS. Analytical expressions and examples of numerical estimates are given. LANL EDS SIS LANLPUBL2004 SIS:2004 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Boer, D D'Alesio, U Murgia, F 1237-1246 Int. J. Mod. Phys. A 18 2003 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0201076 Access to fulltext document http://cds.cern.ch/record/535101/files/0201076.pdf Access to fulltext document http://cds.cern.ch/record/535101/files/0201076.ps.gz Access to fulltext document umberto.dalesio@ca.infn.it University and INFN, Cagliari, Italy University and INFN, Torino, Italy, Vrije Universiteit, Amsterdam, The Netherlands, n 200203 13 20100419 0940 CER01 20020123 PUBLIC 002292145CER ARTICLE Hidden 526616 SzGeCERN 20170222221531.0 oai:cds.cern.ch:526616 cerncds:FULLTEXT 2283459CERCER SPIRES 4777972 Inspire 566604 physics/0111106 eng Arestov, Y Polarization transfer in SIDIS for Lambda production 2001 13 Nov 2001 4 p Polarization transfer from the longitudinally polarized positron to the final-state quark is considered for the underlying QCD subprocesses giving rise to the reaction e+(pol) + p --> e+ + Lambda(pol) + X at the HERMES energy. LANL EDS SzGeCERN Other Fields of Physics PREPRINT LANL EDS General Physics LANL EDS Physics Arestov, Yuri http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=physics&id=0111106 Access to fulltext document http://cds.cern.ch/record/526616/files/0111106.pdf Access to fulltext document http://cds.cern.ch/record/526616/files/0111106.ps.gz Access to fulltext document arestov@mx.ihep.su n 200146 11 20100420 1348 CER01 20011114 486845 dubna20010802 PUBLIC 002283459CER PREPRINT ConferencePaper Hidden 520384 SzGeCERN 20170828004215.0 oai:cds.cern.ch:520384 cerncds:FULLTEXT 2276851CERCER SLAC 4731298 SPIRES 4731298 Inspire 563071 hep-ph/0109186 eng DFTT-2001-28 INFNCA-TH-2001-08 Anselmino, M Transverse Lambda polarization in semi-inclusive DIS 2002 Torino Torino Univ. 20 Sep 2001 10 p Extending a previous description of Lambda and Lambda-bar polarization in unpolarized p-p interactions, within a pQCD factorization scheme with new polarizing fragmentation functions, we give predictions for the transverse polarization of Lambda's and Lambda-bar's in semi-inclusive DIS, both with neutral and charged currents. Comparison with existing data is not yet significant, but more experimental results are expected in the near future. LANL EDS SIS LANLPUBL2002 SIS:2002 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Boer, D D'Alesio, U Murgia, F 114014 Phys. Rev. D 65 2002 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0109186 Access to fulltext document http://cds.cern.ch/record/520384/files/0109186.pdf Access to fulltext document http://cds.cern.ch/record/520384/files/0109186.ps.gz Access to fulltext document francesco.murgia@ca.infn.it University and INFN, Cagliari, Italy University and INFN, Torino, Italy, Vrije Universiteit, Amsterdam, The Netherlands, n 200138 13 20100420 1348 CER01 20010928 PUBLIC 002276851CER ARTICLE Hidden 517922 SzGeCERN 20170828004201.0 DOI 10.1142/9789812778345_0094 oai:cds.cern.ch:517922 cerncds:FULLTEXT 2273921CERCER SPIRES 4664914 Inspire 558952 oai:arXiv.org:hep-ph/0106256 http://export.arxiv.org/oai2 2015-06-25 2015-06-26T08:58:58Z true arXiv hep-ph/0106256 eng Anselmino, M Longitudinal Lambda polarization in polarized semi-inclusive DIS 2001 22 Jun 2001 4 p Comments: LaTeX, 4 pages, 2 ps figures, uses sprocl.sty and epsfig.sty; Talk delivered by U. D'Alesio at the IX International Workshop on Deep Inelastic Scattering (DIS2001), Bologna, 27 April - 1 May, 2001 arXiv We calculate, within pQCD parton model at leading orders, the expression of the longitudinal polarization of Lambda baryons produced in polarized semi-inclusive DIS, including weak interaction effects. We present some numerical estimates in few cases for which data are or will soon be available and discuss how to gather new information on polarized fragmentation functions. LANL EDS SzGeCERN Particle Physics - Phenomenology PREPRINT LANL EDS High Energy Physics - Phenomenology Boglione, M D'Alesio, U Murgia, F http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0106256 Access to fulltext document http://cds.cern.ch/record/517922/files/0106256.pdf Access to fulltext document http://cds.cern.ch/record/517922/files/0106256.ps.gz Access to fulltext document umberto.dalesio@ca.infn.it University and INFN, Cagliari, Italy University and INFN, Torino, Italy, University of Durham, United Kingdom, n 200137 11 20100420 1349 CER01 20010914 480640 bologna20010427 PUBLIC 002273921CER PREPRINT Hidden 517920 SzGeCERN 20170828004201.0 DOI 10.1142/9789812778345_0093 oai:cds.cern.ch:517920 cerncds:FULLTEXT 2273919CERCER SPIRES 4664892 Inspire 558950 oai:arXiv.org:hep-ph/0106254 http://export.arxiv.org/oai2 2015-06-25 2015-06-26T08:58:58Z true arXiv hep-ph/0106254 eng Anselmino, M Transverse Lambda polarization in unpolarized semi-inclusive DIS 2001 22 Jun 2001 4 p Comments: LaTeX, 4 pages, 2 ps figures, uses sprocl.sty and epsfig.sty; Talk delivered by F. Murgia at the IX International Workshop on Deep Inelastic Scattering (DIS2001), Bologna, 27 April - 1 May 2001 arXiv The long-standing problem of transverse Lambda polarization in high-energy collisions of unpolarized hadrons can be tackled by considering new, spin and k_T-dependent quark fragmentation functions for an unpolarized quark into a polarized, spin-1/2 hadron. Simple phenomenological parameterizations of these new "polarizing fragmentation functions", which describe quite well the experimental data on Lambda and Lambda-bar hyperons produced in p-A processes, are utilized and extended here to give predictions for transverse Lambda polarization in semi-inclusive DIS LANL EDS SzGeCERN Particle Physics - Phenomenology PREPRINT LANL EDS High Energy Physics - Phenomenology Boer, D D'Alesio, U Murgia, F http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0106254 Access to fulltext document http://cds.cern.ch/record/517920/files/0106254.pdf Access to fulltext document http://cds.cern.ch/record/517920/files/0106254.ps.gz Access to fulltext document francesco.murgia@ca.infn.it RIKEN-BNL Research Center, University and INFN, Cagliari, Italy University and INFN, Torino, Italy, n 200137 11 20100420 1349 CER01 20010914 480640 bologna20010427 PUBLIC 002273919CER PREPRINT Hidden 505911 SzGeCERN 20250515220301.0 oai:cds.cern.ch:505911 cerncds:THESES INIS cerncds:CERN Inspire 887552 eng Sofer, A CERN Lambda-lambda bar polarization correlations Geneva CERN 1993 mult. p PhD CERN 1993 no fulltext found SzGeCERN Particle Physics - Experiment CERN THESIS CERN LEP OPAL EP h 200052 y2001 14 20110301 1130 CER01 20010627 PUBLIC 002261218CER https://repository.cern/legacy/record/505911 THESIS MIGRATED 494744 SzGeCERN 20211105072015.0 oai:cds.cern.ch:494744 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN cerncds:hep-ex 10.1016/S0550-3213(01)00181-X DOI CERN annual report 2003-3.0854 SLAC 4601092 SPIRES 4601092 Inspire 554759 arXiv hep-ex/0103047 hep-ex CERN-EP-2001-028 eng CERN Library EP-2001-028 ep-2001-028 CERN-EP-2001-028 Astier, P. Paris U., VI-VII LPNHE, University of Paris VI and VII, Paris, France Measurement of the $\overline{\Lambda}$ polarization in $\nu_\mu$ charged current interactions in the NOMAD experiment MUON NEUTRINO NEUTRINO OSCILLATION MAGNETIC DETECTOR 2001 Geneva CERN 29 Mar 2001 14 p paper 14 pages, 4 figures, submitted to Nuclear Physics B arXiv We present a measurement of the polarization of $\alam$ hyperons produced in $\nu_\mu$ charged current interactions. The full data sample from the NOMAD experiment has been analyzed using the same $\vo$ identification procedure and analysis method reported in a previous paper~\cite{NOMAD-polar} for the case of $\lam$ hyperons. The $\alam$ polarization has been measured for the first time in a neutrino experiment. The polarization vector is found to be compatible with zero. HEPDATA CERN-SPS. Measurement of LAMBDABAR polarization in NUMU charged current interactions by the NOMAD collaboration using a wide band neutrino beam with mean energy 43.8 GeV. The data sample consists of 649 reconstructed LAMBDABARs. The longitudinal axis is chosen along the reconstructed W-boson direction. The transverse axis is orthogonal to the LAMBDABAR production plane and the z axis forms a right handed co-ordinate system with the other two. Note that the Feynman X variable, xF,is coded here as XL.. arXiv We present a measurement of the polarization of Antilambda hyperons produced in nu_mu charged current interactions. The full data sample from the NOMAD experiment has been analyzed using the same V0 identification procedure and analysis method reported in a previous paper for the case of Lambda hyperons. The Antilambda polarization has been measured for the first time in a neutrino experiment. The polarization vector is found to be compatible with zero. CC-BY-4.0 Preprint 20010507SLAC CERN EDS CERN-EP LANL EDS OA SIS INSP2001 SIS:2001 PR/LKR added giva 7027178 SzGeCERN Particle Physics - Experiment ARTICLE CERN CERN SPS NOMAD WA96 Autiero, D. CERN CERN, Geneva, Switzerland Baldisseri, A. DAPNIA, Saclay DAPNIA, CEA Saclay, France Baldo-Ceolin, M. INFN, Padua Padua U. University of Padova and INFN, Padova, Italy Banner, M. Paris U., VI-VII LPNHE, University of Paris VI and VII, Paris, France Bassompierre, G. Annecy, LAPP LAPP, Annecy, France Besson, N. DAPNIA, Saclay DAPNIA, CEA Saclay, France Bird, I. CERN Lausanne U. CERN, Geneva, Switzerland University of Lausanne, Lausanne, Switzerland Blumenfeld, B. Johns Hopkins U. Johns Hopkins University, Baltimore, MD, USA Bobisut, F. INFN, Padua Padua U. University of Padova and INFN, Padova, Italy Bouchez, J. DAPNIA, Saclay DAPNIA, CEA Saclay, France Boyd, S. Sydney U. University of Sydney, Sydney, Australia Bueno, A. Harvard U. ETH, Zurich (main) Harvard University, Cambridge, MA, USA ETH Zürich, Zürich, Switzerland Bunyatov, S. Dubna, JINR JINR, Dubna, Russia Camilleri, L. CERN CERN, Geneva, Switzerland Cardini, A. UCLA UCLA, Los Angeles, CA, USA Cattaneo, P.W. INFN, Pavia Pavia U. University of Pavia and INFN, Pavia, Italy Cavasinni, V. INFN, Pisa Pisa U. University of Pisa and INFN, Pisa, Italy Cervera-Villanueva, A. CERN Valencia U., IFIC CERN, Geneva, Switzerland IFIC, Valencia, Spain Chukanov, A. Dubna, JINR JINR, Dubna, Russia Collazuol, G. INFN, Padua Padua U. University of Padova and INFN, Padova, Italy Conforto, G. CERN INFN, Florence Urbino U. CERN, Geneva, Switzerland University of Urbino, Urbino, and INFN, Florence, Italy Conta, C. INFN, Pavia Pavia U. University of Pavia and INFN, Pavia, Italy Contalbrigo, M. INFN, Padua Padua U. University of Padova and INFN, Padova, Italy Cousins, R. UCLA UCLA, Los Angeles, CA, USA Daniels, D. Harvard U. Harvard University, Cambridge, MA, USA Degaudenzi, H. Lausanne U. University of Lausanne, Lausanne, Switzerland Del Prete, T. INFN, Pisa Pisa U. University of Pisa and INFN, Pisa, Italy De Santo, A. CERN CERN, Geneva, Switzerland Dignan, T. Harvard U. Harvard University, Cambridge, MA, USA Di Lella, L. CERN CERN, Geneva, Switzerland do Couto e Silva, E. CERN CERN, Geneva, Switzerland Dumarchez, J. Paris U., VI-VII LPNHE, University of Paris VI and VII, Paris, France Ellis, M. Sydney U. University of Sydney, Sydney, Australia Fazio, T. Annecy, LAPP LAPP, Annecy, France Feldman, G.J. Harvard U. Harvard University, Cambridge, MA, USA Ferrari, R. INFN, Pavia Pavia U. University of Pavia and INFN, Pavia, Italy Ferrère, D. CERN CERN, Geneva, Switzerland Flaminio, V. INFN, Pisa Pisa U. University of Pisa and INFN, Pisa, Italy Fraternali, M. INFN, Pavia Pavia U. University of Pavia and INFN, Pavia, Italy Gaillard, J.-M. Annecy, LAPP LAPP, Annecy, France Gangler, E. CERN Paris U., VI-VII CERN, Geneva, Switzerland LPNHE, University of Paris VI and VII, Paris, France Geiser, A. Dortmund U. CERN Dortmund University, Dortmund, Germany CERN, Geneva, Switzerland Geppert, D. Dortmund U. Dortmund University, Dortmund, Germany Gibin, D. INFN, Padua Padua U. University of Padova and INFN, Padova, Italy Gninenko, S. CERN Moscow, INR CERN, Geneva, Switzerland Inst. Nucl. Research, INR Moscow, Russia Godley, A. Sydney U. University of Sydney, Sydney, Australia Gomez-Cadenas, J.-J. CERN Valencia U., IFIC CERN, Geneva, Switzerland IFIC, Valencia, Spain Gosset, J. DAPNIA, Saclay DAPNIA, CEA Saclay, France Gößling, C. Dortmund U. Dortmund University, Dortmund, Germany Gouanère, M. Annecy, LAPP LAPP, Annecy, France Grant, A. CERN CERN, Geneva, Switzerland Graziani, G. Florence U. INFN, Florence University of Florence and INFN, Florence, Italy Guglielmi, A. INFN, Padua Padua U. University of Padova and INFN, Padova, Italy Hagner, C. DAPNIA, Saclay DAPNIA, CEA Saclay, France Hernando, J. Valencia U., IFIC IFIC, Valencia, Spain Hubbard, D. Harvard U. Harvard University, Cambridge, MA, USA Hurst, P. Harvard U. Harvard University, Cambridge, MA, USA Hyett, N. Melbourne U. University of Melbourne, Melbourne, Australia Iacopini, E. Florence U. INFN, Florence University of Florence and INFN, Florence, Italy Joseph, C. Lausanne U. University of Lausanne, Lausanne, Switzerland Juget, F. Lausanne U. University of Lausanne, Lausanne, Switzerland Kirsanov, M. Moscow, INR Inst. Nucl. Research, INR Moscow, Russia Klimov, O. Dubna, JINR JINR, Dubna, Russia Kokkonen, J. CERN CERN, Geneva, Switzerland Kovzelev, A. Moscow, INR INFN, Pavia Pavia U. Inst. Nucl. Research, INR Moscow, Russia University of Pavia and INFN, Pavia, Italy Krasnoperov, A. Annecy, LAPP Dubna, JINR LAPP, Annecy, France JINR, Dubna, Russia Kustov, D. Dubna, JINR JINR, Dubna, Russia Kuznetsov, V. Dubna, JINR CERN JINR, Dubna, Russia CERN, Geneva, Switzerland Lacaprara, S. INFN, Padua Padua U. University of Padova and INFN, Padova, Italy Lachaud, C. Paris U., VI-VII LPNHE, University of Paris VI and VII, Paris, France Lakić, B. Boskovic Inst., Zagreb Rudjer Bošković Institute, Zagreb, Croatia Lanza, A. INFN, Pavia Pavia U. University of Pavia and INFN, Pavia, Italy La Rotonda, L. Calabria U. INFN, Cosenza University of Calabria and INFN, Cosenza, Italy Laveder, M. INFN, Padua Padua U. University of Padova and INFN, Padova, Italy Letessier-Selvon, A. Paris U., VI-VII LPNHE, University of Paris VI and VII, Paris, France Levy, J.-M. Paris U., VI-VII LPNHE, University of Paris VI and VII, Paris, France Linssen, L. CERN CERN, Geneva, Switzerland Ljubičić, A. Boskovic Inst., Zagreb Rudjer Bošković Institute, Zagreb, Croatia Long, J. Johns Hopkins U. Johns Hopkins University, Baltimore, MD, USA Lupi, A. Florence U. INFN, Florence University of Florence and INFN, Florence, Italy Marchionni, A. Florence U. INFN, Florence University of Florence and INFN, Florence, Italy Martelli, F. INFN, Florence Urbino U. University of Urbino, Urbino, and INFN, Florence, Italy Méchain, X. DAPNIA, Saclay DAPNIA, CEA Saclay, France Mendiburu, J.-P. Annecy, LAPP LAPP, Annecy, France Meyer, J.-P. DAPNIA, Saclay DAPNIA, CEA Saclay, France Mezzetto, M. INFN, Padua Padua U. University of Padova and INFN, Padova, Italy Mishra, S.R. Harvard U. South Carolina U. Harvard University, Cambridge, MA, USA University of South Carolina, Columbia, SC, USA Moorhead, G.F. Melbourne U. University of Melbourne, Melbourne, Australia Naumov, D. Dubna, JINR JINR, Dubna, Russia Nédélec, P. Annecy, LAPP LAPP, Annecy, France Nefedov, Yu. Dubna, JINR JINR, Dubna, Russia Nguyen-Mau, C. Lausanne U. University of Lausanne, Lausanne, Switzerland Orestano, D. INFN, Rome3 Rome III U. Roma Tre University and INFN, Rome, Italy Pastore, F. INFN, Rome3 Rome III U. Roma Tre University and INFN, Rome, Italy Peak, L.S. Sydney U. University of Sydney, Sydney, Australia Pennacchio, E. INFN, Florence Urbino U. University of Urbino, Urbino, and INFN, Florence, Italy Pessard, H. Annecy, LAPP LAPP, Annecy, France Petti, R. CERN INFN, Pavia Pavia U. CERN, Geneva, Switzerland University of Pavia and INFN, Pavia, Italy Placci, A. CERN CERN, Geneva, Switzerland Polesello, G. INFN, Pavia Pavia U. University of Pavia and INFN, Pavia, Italy Pollmann, D. Dortmund U. Dortmund University, Dortmund, Germany Polyarush, A. Moscow, INR Inst. Nucl. Research, INR Moscow, Russia Popov, B. boris.popov@cern.ch Dubna, JINR Paris U., VI-VII JINR, Dubna, Russia LPNHE, University of Paris VI and VII, Paris, France Poulsen, C. Melbourne U. University of Melbourne, Melbourne, Australia Rico, J. ETH, Zurich (main) ETH Zürich, Zürich, Switzerland Riemann, P. Dortmund U. Dortmund University, Dortmund, Germany Roda, C. CERN INFN, Pisa Pisa U. CERN, Geneva, Switzerland University of Pisa and INFN, Pisa, Italy Rubbia, A. CERN ETH, Zurich (main) CERN, Geneva, Switzerland ETH Zürich, Zürich, Switzerland Salvatore, F. INFN, Pavia Pavia U. University of Pavia and INFN, Pavia, Italy Schahmaneche, K. Paris U., VI-VII LPNHE, University of Paris VI and VII, Paris, France Schmidt, B. Dortmund U. CERN Dortmund University, Dortmund, Germany CERN, Geneva, Switzerland Schmidt, T. Dortmund U. Dortmund University, Dortmund, Germany Sevior, M. Melbourne U. University of Melbourne, Melbourne, Australia Sillou, D. Annecy, LAPP LAPP, Annecy, France Soler, F.J.P. CERN Sydney U. CERN, Geneva, Switzerland University of Sydney, Sydney, Australia Sozzi, G. Lausanne U. University of Lausanne, Lausanne, Switzerland Steele, D. Johns Hopkins U. Lausanne U. Johns Hopkins University, Baltimore, MD, USA University of Lausanne, Lausanne, Switzerland Stiegler, U. CERN CERN, Geneva, Switzerland Stipčević, M. Boskovic Inst., Zagreb Rudjer Bošković Institute, Zagreb, Croatia Stolarczyk, Th. DAPNIA, Saclay DAPNIA, CEA Saclay, France Tareb-Reyes, M. Lausanne U. University of Lausanne, Lausanne, Switzerland Taylor, G.N. Melbourne U. University of Melbourne, Melbourne, Australia Tereshchenko, V. Dubna, JINR JINR, Dubna, Russia Toropin, A. Moscow, INR Inst. Nucl. Research, INR Moscow, Russia Touchard, A.-M. Paris U., VI-VII LPNHE, University of Paris VI and VII, Paris, France Tovey, S.N. CERN Melbourne U. CERN, Geneva, Switzerland University of Melbourne, Melbourne, Australia Tran, M.-T. Lausanne U. University of Lausanne, Lausanne, Switzerland Tsesmelis, E. CERN CERN, Geneva, Switzerland Ulrichs, J. Sydney U. University of Sydney, Sydney, Australia Vacavant, L. Lausanne U. University of Lausanne, Lausanne, Switzerland Valdata-Nappi, M. Calabria U. INFN, Cosenza University of Calabria and INFN, Cosenza, Italy Valuev, V. Dubna, JINR UCLA JINR, Dubna, Russia UCLA, Los Angeles, CA, USA Vannucci, F. Paris U., VI-VII LPNHE, University of Paris VI and VII, Paris, France Varvell, K.E. Sydney U. University of Sydney, Sydney, Australia Veltri, M. INFN, Florence Urbino U. University of Urbino, Urbino, and INFN, Florence, Italy Vercesi, V. INFN, Pavia Pavia U. University of Pavia and INFN, Pavia, Italy Vidal-Sitjes, G. CERN CERN, Geneva, Switzerland Vieira, J.-M. Lausanne U. University of Lausanne, Lausanne, Switzerland Vinogradova, T. UCLA UCLA, Los Angeles, CA, USA Weber, F.V. Harvard U. CERN Harvard University, Cambridge, MA, USA CERN, Geneva, Switzerland Weisse, T. Dortmund U. Dortmund University, Dortmund, Germany Wilson, F.F. CERN CERN, Geneva, Switzerland Winton, L.J. Melbourne U. University of Melbourne, Melbourne, Australia Yabsley, B.D. Sydney U. University of Sydney, Sydney, Australia Zaccone, H. DAPNIA, Saclay DAPNIA, CEA Saclay, France Zuber, K. Dortmund U. Dortmund University, Dortmund, Germany Zuccon, P. INFN, Padua Padua U. University of Padova and INFN, Padova, Italy NOMAD Collaboration EP Krasnoperov, A V 3-14 1-3 Nucl. Phys. B 605 2001 CERN ARC Library CERN-EP-2001-028 http://weblib.cern.ch/abstract?CERN-EP-2001-028 Preprint 1354626 203175 http://cds.cern.ch/record/494744/files/arXiv:hep-ex_0103047.pdf 1354617 13614 http://cds.cern.ch/record/494744/files/EPS_alam-cosy_corr.png 00008 \it Top: normalized angular distributions ($\cos \theta_i$) for $\alam$ hyperons in reconstructed Monte Carlo events (histogram) and in data (points with error bars). Bottom: experimental angular distributions corrected for detector acceptance and selection effects; the polarization is given by the slope of the corresponding linear fit. 1354618 24459 http://cds.cern.ch/record/494744/files/EPS_v0_mass_1_3.png 00002 \it Normalized invariant mass distributions in both data (points with error bars) and MC (histogram) calculated for $\vo$ vertices under the assumption of a $\alam$ decay before (left) and after (right) the $\vo$ identification procedure. 1354619 13683 http://cds.cern.ch/record/494744/files/EPS_alam-cosx_corr.png 00007 \it Top: normalized angular distributions ($\cos \theta_i$) for $\alam$ hyperons in reconstructed Monte Carlo events (histogram) and in data (points with error bars). Bottom: experimental angular distributions corrected for detector acceptance and selection effects; the polarization is given by the slope of the corresponding linear fit. 1354620 13768 http://cds.cern.ch/record/494744/files/EPS_alam-cosz_corr.png 00009 \it Top: normalized angular distributions ($\cos \theta_i$) for $\alam$ hyperons in reconstructed Monte Carlo events (histogram) and in data (points with error bars). Bottom: experimental angular distributions corrected for detector acceptance and selection effects; the polarization is given by the slope of the corresponding linear fit. 1354621 14179 http://cds.cern.ch/record/494744/files/EPS_alam-cosz.png 00006 \it Top: normalized angular distributions ($\cos \theta_i$) for $\alam$ hyperons in reconstructed Monte Carlo events (histogram) and in data (points with error bars). Bottom: experimental angular distributions corrected for detector acceptance and selection effects; the polarization is given by the slope of the corresponding linear fit. 1354622 14087 http://cds.cern.ch/record/494744/files/EPS_alam-cosy.png 00005 \it Top: normalized angular distributions ($\cos \theta_i$) for $\alam$ hyperons in reconstructed Monte Carlo events (histogram) and in data (points with error bars). Bottom: experimental angular distributions corrected for detector acceptance and selection effects; the polarization is given by the slope of the corresponding linear fit. 1354623 14079 http://cds.cern.ch/record/494744/files/EPS_alam-cosx.png 00004 \it Top: normalized angular distributions ($\cos \theta_i$) for $\alam$ hyperons in reconstructed Monte Carlo events (histogram) and in data (points with error bars). Bottom: experimental angular distributions corrected for detector acceptance and selection effects; the polarization is given by the slope of the corresponding linear fit. 1354624 37391 http://cds.cern.ch/record/494744/files/EPS_numu-distr-antilambda_1.png 00003 \it Comparison of reconstructed kinematic variables for $\nu_\mu$ CC events containing identified $\alam$ hyperons for simulated (histogram) and data (points with error bars) events: a) neutrino energy, b) $\alam$ momentum, c) momentum of the outgoing $\pi^+$ from the $\alam$ decay, d) transverse component of the momentum of one of the outgoing charged tracks with respect to the $\vo$ direction (internal $p_T$), e) $x$-Feynman, f) square of the transverse component of the $\alam$ momentum with respect to the hadronic jet direction, g) $x$-Bjorken, h) $y$-Bjorken, i) fraction of the total hadronic energy carried by the $\alam$ in the laboratory system. 1354625 31245 http://cds.cern.ch/record/494744/files/EPS_v0_raw_mass_one_plot_1_3.png 00001 \it Normalized invariant mass distributions in both data (points with error bars) and MC (histogram) calculated for $\vo$ vertices under the assumption of a $\alam$ decay before (left) and after (right) the $\vo$ identification procedure. 1354627 17637 http://cds.cern.ch/record/494744/files/EPS_r12875e12458_yz_bw.png 00000 \it A reconstructed data event containing 2 $\vo$ vertices identified as $\lam$ and $\alam$ decays by our identification procedure. The scale on this plot is given by the size of the vertex boxes ($3\times3$ cm$^2$). 61174 155638 http://cds.cern.ch/record/494744/files/ep-2001-028.ps.gz Fulltext 61174 319086 http://cds.cern.ch/record/494744/files/ep-2001-028.pdf Fulltext jane.waywell@cern.ch LPNHE, Univ. Paris VI and VII, Paris CERN DAPNIA, CEA Saclay Univ. Padova and INFN, Padova LAPP, Annecy Univ. Lausanne Johns Hopkins Univ., Baltimore Univ. Sydney Harvard Univ., Cambridge ETH Zürich JINR, Dubna UCLA, Los Angeles Univ. Pavia and INFN, Pavia Univ. Pisa and INFN, Pisa IFIC, Centre Mixt Universitat de València and CSIC Univ. Urbino, Urbino, and INFN Florence Dortmund Univ., Dortmund Inst. Nucl. Research, INR Moscow Univ. Florence and INFN, Florence Univ. Melbourne, Melbourne Rudjer Bo\v{s}kovi\'{c} Institute, Zagreb Univ. Calabria and INFN, Cosenza Univ. South Carolina, Columbia Roma Tre Univ. and INFN, Rome n 200119 a2003 13 20100420 1351 CER01 20091117 PUBLIC 0001 002249332CER ARTICLE 485352 SzGeCERN 20230312070139.0 oai:cds.cern.ch:485352 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN cerncds:hep-ph DOI 10.1063/1.1384107 CERCER 2239192 SLAC 4557778 CERN annual report 2004-3.0898 SPIRES 4557778 Inspire 540063 arXiv hep-ph/0101325 hep-ph eng Naumov, Dmitry V. Dubna, JINR Measurement of Lambda polarization in muon neutrino charged current interactions in NOMAD Measurement of Lambda0 polarization in nu/mu CC interactions in NOMAD. arXiv 2001-08-14 Dubna Joint Inst. Nucl. Res. 29 Jan 2001 5 p a talk given at SPIN2000 (Osaka) symposium, October 16-21 (5 pages) Journal-ref: Published in AIP Conf.Proc.570:489-493,2001 arXiv The Lambda polarization in muon neutrino charged current interactions has been measured in the NOMAD experiment. We observe negative polarization along the W - boson direction which is enhanced in the target fragmentation region: Px (xF < 0) = -0.21 +/- 0.04(stat) +/- 0.02(sys). In the current fragmentation region we find: Px (xF > 0) = -0.09 +/- 0.06(stat) +/- 0.03(sys). These results provide a test of different models describing the nucleon spin composition and the spin transfer mechanisms. A significant transverse polarization (in the direction orthogonal to the Lambda production plane) has been observed for the first time in a neutrino experiment: Py = -0.22 +/- 0.03(stat) +/- 0.01(sys). The dependence of the absolute value of Py on the Lambda transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments. The Lambda polarization in muon neutrino charged current interactions has been measured in the NOMAD experiment. We observe negative polarization along the W - boson direction which is enhanced in the target fragmentation region: Px (xF < 0) = -0.21 +/- 0.04(stat) +/- 0.02(sys). In the current fragmentation region we find: Px (xF > 0) = -0.09 +/- 0.06(stat) +/- 0.03(sys). These results provide a test of different models describing the nucleon spin composition and the spin transfer mechanisms. A significant transverse polarization (in the direction orthogonal to the Lambda production plane) has been observed for the first time in a neutrino experiment: Py = -0.22 +/- 0.03(stat) +/- 0.01(sys). The dependence of the absolute value of Py on the Lambda transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments. The Lambda polarization in muon neutrino charged current interactions has been measured in the NOMAD experiment. We observe negative polarization along the W - boson direction which is enhanced in the target fragmentation region: Px (xF < 0) = -0.21 +/- 0.04(stat) +/- 0.02(sys). In the current fragmentation region we find: Px (xF > 0) = -0.09 +/- 0.06(stat) +/- 0.03(sys). These results provide a test of different models describing the nucleon spin composition and the spin transfer mechanisms. A significant transverse polarization (in the direction orthogonal to the Lambda production plane) has been observed for the first time in a neutrino experiment: Py = -0.22 +/- 0.03(stat) +/- 0.01(sys). The dependence of the absolute value of Py on the Lambda transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments. The Lambda polarization in muon neutrino charged current interactions has been measured in the NOMAD experiment. We observe negative polarization along the W - boson direction which is enhanced in the target fragmentation region: Px (xF < 0) = -0.21 +/- 0.04(stat) +/- 0.02(sys). In the current fragmentation region we find: Px (xF > 0) = -0.09 +/- 0.06(stat) +/- 0.03(sys). These results provide a test of different models describing the nucleon spin composition and the spin transfer mechanisms. A significant transverse polarization (in the direction orthogonal to the Lambda production plane) has been observed for the first time in a neutrino experiment: Py = -0.22 +/- 0.03(stat) +/- 0.01(sys). The dependence of the absolute value of Py on the Lambda transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments. The Lambda polarization in muon neutrino charged current interactions has been measured in the NOMAD experiment. We observe negative polarization along the W - boson direction which is enhanced in the target fragmentation region: Px (xF < 0) = -0.21 +/- 0.04(stat) +/- 0.02(sys). In the current fragmentation region we find: Px (xF > 0) = -0.09 +/- 0.06(stat) +/- 0.03(sys). These results provide a test of different models describing the nucleon spin composition and the spin transfer mechanisms. A significant transverse polarization (in the direction orthogonal to the Lambda production plane) has been observed for the first time in a neutrino experiment: Py = -0.22 +/- 0.03(stat) +/- 0.01(sys). The dependence of the absolute value of Py on the Lambda transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments. AIP The Λ0 polarization in νμ charged current interactions has been measured in the NOMAD experiment. The event sample (8087 reconstructed Λ0’s) is more than an order of magnitude larger than that of previous bubble chamber experiments, while the quality of event reconstruction is comparable. We observe negative polarization along the W-boson direction which is enhanced in the target fragmentation region: Px(xF<0)=−0.21±0.04(stat)±0.02(sys). In the current fragmentation region we find Px(xF>0)=−0.09±0.06(stat)±0.03(sys). These results provide a test of different models describing the nucleon spin composition and the spin transfer mechanisms. A significant transverse polarization (in the direction orthogonal to the Λ0 production plane) has been observed for the first time in a neutrino experiment: Py=−0.22±0.03(stat)±0.01(sys). The dependence of the absolute value of Py on the Λ0 transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments. LANL EDS SIS LANLPUBL2002 SIS:2002 PR/LKR added SzGeCERN Particle Physics - Experiment ARTICLE CERN CERN SPS NOMAD WA96 LANL EDS High Energy Physics - Phenomenology EP Naumov, Dmitry V. 489-493 AIP Conf. Proc. 570 2000 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0101325 Access to fulltext document http://cds.cern.ch/record/485352/files/0101325.pdf Access to fulltext document 61118 153143 http://cds.cern.ch/record/485352/files/0101325.ps.gz Access to fulltext document 61118 121742 2432848 111440 http://cds.cern.ch/record/485352/files/arXiv:hep-ph_0101325.pdf naumov@thsun1.jinr.ru n 200105 a2004 13 20100420 1352 CER01 20010130 405139 489-493 osaka20001016 PUBLIC 002239192CER ARTICLE ConferencePaper 483903 SzGeCERN 20170828003849.0 oai:cds.cern.ch:483903 cerncds:FULLTEXT 2237680CERCER SPIRES 4547870 Inspire 552202 hep-ph/0101195 eng CPT-4092 Bourrely, C Deep Inelastic Scattering of Leptons and Hadrons in the QCD Parton Model and Experimental Tests 2002 17 Jan 2001 29 p We present the basic aspects of deep inelastic phenomena in the framework of the QCD parton model. After recalling briefly the standard kinematics, we discuss the physical interpretation of unpolarized and polarized structure functions in terms of parton distributions together with several important sum rules. We also make a rapid survey of the experimental situation together with phenomenological tests, in particular concerning various QCD predictions. In the summary, we try to identify some significant open questions, to clarify where we stand and to see what we expect to learn in the future. LANL EDS SIS LANLPUBL2002 SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Soffer, J 1565-1581 Academic Press 2002 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0101195 Fulltext http://cds.cern.ch/record/483903/files/0101195.pdf Fulltext http://cds.cern.ch/record/483903/files/0101195.ps.gz Fulltext Claude.Bourrely@cpt.univ-mrs.fr n 200103 13 20100420 1352 CER01 20010118 PUBLIC 002237680CER ARTICLE Hidden 720451 SzGeCERN 20170828005516.0 DOI 10.1016/j.physletb.2003.08.069 oai:cds.cern.ch:720451 cerncds:FULLTEXT SPIRES 5738440 Inspire 634452 oai:arXiv.org:hep-ph/0403010 http://export.arxiv.org/oai2 2015-06-25 2015-06-26T08:58:58Z true arXiv hep-ph/0403010 eng USM-TH-140 Ma Bo Qiang Ratio of $\bar{\Lambda}/\Lambda$ in Semi-inclusive Electroproduction 2003 Valparadíso Santa Maria Univ. Dept. Fís. 29 Feb 2004 Comments: 11 latex files, 6 figures arXiv It is shown that the $\bar{\Lambda}/\Lambda$ cross section ratio in semi-inclusive electroproduction of $\Lambda$ and $\bar{\Lambda}$ hyperons in deep inelastic scattering of charged lepton on a nucleon target, can provide useful information on the quark to $\Lambda$ fragmentation functions. This ratio is calculated explicitly in a quark-diquark model, a pQCD based analysis, and an SU(3) symmetry model, with three different options for the contribution from the unfavored fragmentation functions. The $x$-dependence of this ratio is sensitive to the ratio of unfavored fragmentation functions over favored fragmentation functions, $D_{\bar{u}}^{\Lambda}(z)/D_{u}^{\Lambda}(z)$, whereas the $z$-dependence is sensitive to the flavor structure of the fragmentation functions, i.e., the ratio $D_u^{\Lambda}(z)/D_s^{\Lambda}(z)$. Future measurements by the HERMES Collaboration at DESY can discriminate between various cases. LANL EDS SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Schmidt, Ivan Yang Jian Jun Ma, Bo-Qiang Schmidt, Ivan Yang, Jian-Jun 35-40 Phys. Lett. B 574 2003 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0403010 Access to fulltext document http://cds.cern.ch/record/720451/files/0403010.pdf Access to fulltext document n 200410 13 20100417 1140 CER01 20040302 PUBLIC 002434652CER ARTICLE Hidden 491213 SzGeCERN 20170828003938.0 DOI 10.1103/PhysRevD.64.014017 DOI 10.1103/PhysRevD.64.099901 oai:cds.cern.ch:491213 cerncds:FULLTEXT 2245580CERCER SPIRES 4588681 oai:arXiv.org:hep-ph/0103136 http://export.arxiv.org/oai2 2014-11-17 2014-11-19T06:18:46Z arXiv true arXiv Inspire 554015 hep-ph/0103136 eng CPT-4045 USM-TH-97 Ma, B Q Helicity and Transversity Distribution of Nucleon and $\Lambda$-Hyperon from $\Lambda$ Fragmentation 2001 Valparadíso Santa Maria Univ. Dept. Fís. 13 Mar 2001 16 p Comments: 17 latex pages, 4 figures, published in PRD64, 014017 (2001), Erratum added concerning a wrong comparison with data, published in PRD64, 099901 (2001) It is shown that $\Lambda$-hyperon fragmentation in charged lepton deep inelastic scattering (DIS) on a polarized nucleon target can provide sensitive information concerning the quark helicity and transversity distributions for both nucleon and $\Lambda$-hyperon at large $x$. Numerical predictions are given for the spin transfers of the produced $\Lambda$, when the target nucleon is polarized either longitudinally or transversely, and with the nucleon and $\Lambda$ quark distributions evaluated both in an SU(6) quark-spectator-diquark model and in a perturbative QCD (pQCD) based model. It is also shown that the predicted spin transfers have different behaviors for proton and neutron targets, and this can provide sensitive tests of different predictions for the quark helicity and transversity distributions of the $d$ valence quark of the proton at large $x$. LANL EDS SIS LANLPUBL2002 SIS:2002 PR/LKR added SzGeCERN Particle Physics - Phenomenology Nuclear Physics - Theory arXiv Nuclear Physics - Experiment arXiv Particle Physics - Experiment arXiv ARTICLE LANL EDS High Energy Physics - Phenomenology Schmidt, I Soffer, J Yang Jian Jun Ma, Bo-Qiang Schmidt, Ivan Soffer, Jacques Yang, Jian-Jun 014017 Phys. Rev. D 64 2001 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0103136 Access to fulltext document http://cds.cern.ch/record/491213/files/0103136.pdf Access to fulltext document http://cds.cern.ch/record/491213/files/0103136.ps.gz Access to fulltext document mabq@phy.pku.edu.cn n 200111 13 20100420 1351 CER01 20010314 PUBLIC 002245580CER ARTICLE Hidden 528574 SzGeCERN 20170828004319.0 oai:cds.cern.ch:528574 cerncds:FULLTEXT 2285477CERCER SLAC 4790634 SPIRES 4790634 Inspire 567368 hep-ph/0111382 eng USM-TH-117 Yang Jian Jun $q \to \Lambda$ Fragmentation Function and Nucleon Transversity Distribution in a Diquark Model 2002 Valparadíso Santa Maria Univ. Dept. Fís. 28 Nov 2001 Based on a simple quark-diquark model, we propose a set of unpolarized, longitudinally polarized and transversely polarized fragmentation functions for the $\Lambda$ by fitting the unpolarized $\Lambda$ production data in $e^+ e ^- $ annihilation. It is found that the helicity structure of the obtained $\Lambda$ fragmentation functions is supported by the all available experimental data on the longitudinal $\Lambda$ polarization. Within the same framework of the diquark model, the nucleon transversity distributions are presented and consistent descriptions of the available HERMES data on the azimuthal spin asymmetries in pion electroproduction are obtained. Furthermore, the spin transfers to the transversely polarized $\Lambda$ in the charged lepton DIS on a transversely polarized nucleon target are predicted for future experiments. LANL EDS SIS LANLPUBL2002 SIS:2002 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Yang, Jian-Jun 562-578 Nucl. Phys. A 699 2002 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0111382 Access to fulltext document http://cds.cern.ch/record/528574/files/0111382.pdf Access to fulltext document http://cds.cern.ch/record/528574/files/0111382.ps.gz Access to fulltext document jjyang@fis.utfsm.cl Santa Maria U. and Nanjing Normal U. n 200148 13 20100420 1347 CER01 20011129 PUBLIC 002285477CER ARTICLE Hidden