430442 SzGeCERN 20170826064328.0 CERCER 2179822 SLAC 4331990 SPIRES 4331990 Inspire 524770 hep-ph/0003076 eng PNU-NTG-2000-01 RUB-TP-2-2000-4 Kim, H C Spin content of the $\Lambda$ hyperon 2000 Bochum Bochum TU. Inst. Theor. Phys. 2 Using the known experimental data for the hyperon semileptonic decayconstants, we calculate integrated quark densities $\Delta q_\Lambda$ and $\Delta \Sigma_\Lambda$ for the hyperon $\Lambda$ with flavor SU(3) symmetrybreaking taken into account. Symmetry breaking is implemented with the help ofthe chiral quark-soliton model in an approach, in which the dynamicalparameters are fixed by the experimental data for six hyperon semileptonicdecay constants. This parametrization allows us to reproduce the first momentof the $g_1^{{\rm p}}(x)$ of the proton. For the $\Lambda$ we obtain: $\Deltau_{\Lambda}=\Delta d_{\Lambda} \approx 0$ and $\Delta s_{\Lambda}$ of the orderof 1. Unfortunately large experimental errors of $\Xi^-$ decays propagate inour analysis especially in the case of $\Delta\Sigma_{\Lambda}$ and $\Deltas_{\Lambda}$. Only if the errors for these decays are reduced, the accuratetheoretical predictions for $\Delta\Sigma_{\Lambda}$ and $\Delta s_{\Lambda}$will be possible. LANL EDS SIS LANLPUBL2001 SIS:2001 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE Praszalowicz, M Göke, K Kim, Hyun-Chul Praszalowicz, Michal 1767 Acta Phys. Pol. B 31 2000 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=:hep-ph&id=0003076 Access to fulltext document hchkim@hadron.phys.pusan.ac.kr n 200010 13 20100421 1411 CER01 20000310 PUBLIC 002179822CER ARTICLE Hidden 468863 SzGeCERN 20170828003734.0 DOI 10.1063/1.1413164 oai:cds.cern.ch:468863 cerncds:FULLTEXT 2222198CERCER SLAC 4482050 SPIRES 4482050 Inspire 535141 oai:arXiv.org:hep-ph/0010166 http://export.arxiv.org/oai2 2015-06-25 2015-06-26T08:58:58Z true arXiv hep-ph/0010166 eng Anselmino, M $\Lambda$ and $\overline{\Lambda}$ polarization as a measurement of distribution and fragmentation functions 2000 Comments: Talk presented by M. Boglione at the "Second Workshop on Physics with an Electron Polarized Light Ion Collider", MIT, Sept. 14-16, 2000 arXiv A combined analysis of the polarization vector of the Lambda baryons produced in DIS processes may give a relevant insight of the hadronization process which governs the transition from partons to physical hadrons and precise indications on the mechanisms of $spin$ transfer from partons to hadrons. We give here a short review of some interesting results. LANL EDS SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Boglione, M Murgia, F AIP Conf. Proc. 588 2001 255-259 AIP Conf.Proc. 588 (2001) 255-259 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0010166 Access to fulltext document http://cds.cern.ch/record/468863/files/0010166.pdf Access to fulltext document http://cds.cern.ch/record/468863/files/0010166.ps.gz Access to fulltext document Elena.Boglione@durham.ac.uk Amsterdam U. Torino Univ. INFN Torino INFN Cagliari Univ. Cagliari n 200042 13 20100421 1408 CER01 20001017 442503 255-259 cambridge20000914 PUBLIC 002222198CER ARTICLE Hidden 453693 SzGeCERN 20180924172824.0 oai:cds.cern.ch:453693 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN 10.1016/S0550-3213(00)00503-4 DOI CERN annual report 2001-3.1122 INSPEC 6775264 SPIRES 4452704 Inspire 532522 CERN-EP-2000-111 eng CERN Library EP-2000-111 ep-2000-111 Astier, Pierre Measurement of the $\Lambda$ polarization in $\nu_\mu$ charged current interactions in the NOMAD experiment 2000 Geneva CERN 27 Jul 2000 12 p paper The $\Lambda$ polarization in $\nu_\mu$ 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 event reconstruction is comparable. We observe negative polarization along the $W$-boson direction which is enhanced in the target fragmentation region: $P_x (x_F < 0) = -0.21 \pm 0.04 \mbox{(stat)} \pm 0.02 \mbox{(sys)}$. In the current fragmentation region we find $P_x (x_F > 0) = -0.09 \pm 0.06 \mbox{(stat)} \pm 0.03 \mbox{(sys)}$. 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: $P_y = -0.22 \pm 0.03 \mbox{(stat)} \pm 0.01 \mbox{(sys)}$. The dependence of the absolute value of $P_y$ on the $\Lambda$ transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized 20000905SLAC CERN EDS CERN-EP OA SIS INSP2002 SIS:2002 PR/LKR added 6775264 SzGeCERN Particle Physics - Experiment ARTICLE CERN CERN SPS NOMAD WA96 INSPEC A1388 (Polarization in elementary particle interactions and scattering) INSPEC A1230 (Models of weak interactions) INSPEC A1360H (Total and inclusive cross sections) INSPEC A1315 (Neutrino interactions) INSPEC A1420J (Hyperons and hyperon resonances) INSPEC charged-currents INSPEC hadron-leptoproduction INSPEC hyperon-production INSPEC lambda-baryons INSPEC neutrino-nucleon-interactions INSPEC polarisation-in-elementary-particle-interactions INSPEC semi-inclusive-interactions Autiero, D Baldisseri, Alberto AUTHOR|(CDS)2071350 #BEARD# Baldo-Ceolin, Massimilla Banner, M Bassompierre, Gabriel Benslama, K Besson, N Bird, I Blumenfeld, B AUTHOR|(CDS)2051118 #BEARD# Bobisut, F Bouchez, J Boyd, S Bueno, A G Bunyatov, S A Camilleri, L L Cardini, A Cattaneo, Paolo Walter Cavasinni, V AUTHOR|(CDS)2073647 #BEARD# Cervera-Villanueva, A Chukanov, A Collazuol, G Conforto, G Conta, C Contalbrigo, M Cousins, R D Daniels, D C Degaudenzi, H M Del Prete, T De Santo, A Dignan, T Di Lella, L do Couto e Silva, E Dumarchez, J Ellis, M Fazio, T Feldman, G J Ferrari, R Ferrère, D Flaminio, Vincenzo Fraternali, M Gaillard, Jean-Marc Gangler, E Geiser, A Geppert, D Gibin, D Gninenko, S N Godley, A Gómez-Cadenas, J J Gosset, J Gössling, C Gouanère, M Grant, A Graziani, G AUTHOR|(CDS)2069608 #BEARD# Guglielmi, A M Hagner, C Hernando, J Hubbard, D B Hurst, P Hyett, N Iacopini, E Joseph, C L Juget, F R Kirsanov, M M Klimov, O L Kokkonen, J Kovzelev, A Krasnoperov, A V Kustov, D V Kuznetsov, V Lacaprara, S Lachaud, C Lakic, B Lanza, A La Rotonda, L Laveder, M Letessier-Selvon, A A Lévy, J M Linssen, Lucie Ljubicic, A Long, J AUTHOR|(CDS)2077192 #BEARD# Lupi, A AUTHOR|(CDS)2073835 #BEARD# Marchionni, A AUTHOR|(CDS)2072225 #BEARD# Martelli, F Méchain, X Mendiburu, J P Meyer, J P Mezzetto, Mauro Mishra, S R Moorhead, G F Naumov, D V Nédélec, P Nefedov, Yu A Nguyen-Mau, C AUTHOR|(CDS)2078952 #BEARD# Orestano, D Pastore, F Peak, L S Pennacchio, E Pessard, H Petti, R Placci, Alfredo Polesello, G Pollmann, D Polyarush, A Yu Popov, B Poulsen, C Rathouit, P Rico, J Riemann, P Roda, C AUTHOR|(CDS)2073273 #BEARD# Rubbia, André Salvatore, F Schahmaneche, K Schmidt, B AUTHOR|(CDS)2072725 #BEARD# Schmidt, T Sevior, M E Sillou, D Soler, F J P Sozzi, G Steele, D Stiegler, U Stipcevic, M Stolarczyk, T Tareb-Reyes, M Taylor, G N Tereshchenko, S Toropin, A N Touchard, A M Tovey, Stuart N Tran, M T Tsesmelis, E Ulrichs, J Vacavant, L Valdata-Nappi, M Valuev, V Yu Vannucci, François CERN Varvell, K E Veltri, M AUTHOR|(CDS)2072973 #BEARD# Vercesi, V Vieira, J M Vinogradova, T G Weber, F Weisse, T Wilson, F F Winton, L J Yabsley, B D Zaccone, Henri Zuber, K Zuccon, P NOMAD Collaboration EP 3-36 1-2 Nucl. Phys. B 588 2000 CERN ARC Library CERN-EP-2000-111 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=ep-2000-111 Fulltext http://cds.cern.ch/record/453693/files/453693.zip Source files restricted to CERN users http://cds.cern.ch/record/453693/files/ep-2000-111.pdf Fulltext http://cds.cern.ch/record/453693/files/ep-2000-111.ps.gz Fulltext Sandrine.Sciarrino@cern.ch CERN LPNHE, Univ. of Paris, Paris VI and VII, France DAPNIA, CEA Saclay, France Univ. of Padova and INFN, Padova, Italy LAPP, Annecy, France University of Lausanne, Lausanne, Switzerland Johns Hopkins Univ., Baltimore, MD, USA Univ. of Sydney, Sydney, Australia Harvard Univ., Cambridge, MA, USA ETH Zürich, Zürich, Switzerland JINR, Dubna, Russia UCLA, Los Angeles, CA, USA Univ. of Pavia and INFN, Pavia, Italy Univ. of Pisa and INFN, Pisa, Italy IFIC, Centre Mixt Universitat de València and CSIC Univ. of Urbino, Urbino, and INFN Florence, Italy Dortmund Univ., Dortmund, Germany Inst. Nucl. Research, INR Moscow, Russia Univ. of Florence and INFN, Florence, Italy University of Melbourne, Melbourne, Australia Rudjer Boskovic Institute, Zagreb, Croatia Univ. of Calabria and INFN, Cosenza, Italy Univ. of South Carolina, Columbia, SC, USA Roma-III Univ., Rome, Italy n 200036 a2001 13 20100901 1605 CER01 20091117 PUBLIC 0001 002205492CER ARTICLE 453225 SzGeCERN 20170828003646.0 oai:cds.cern.ch:453225 cerncds:FULLTEXT 2204371CERCER SLAC 4445694 SPIRES 4445694 Inspire 531883 hep-ph/0008186 eng DFTT-2000-32 INFNCA-TH-2000-12 Anselmino, M Lambda polarization from unpolarized quark fragmentation 2001 Torino Torino Univ. 17 Aug 2000 1 p The longstanding problem of explaining the observed polarization of Lambda hyperons inclusively produced in the high energy collisions of unpolarized hadrons is tackled by considering spin and k_T dependent quark fragmentation functions. The data on Lambda's and Lambda-bar's produced in p-N processes are used to determine simple phenomenological expressions for these new "polarizing fragmentation functions", which describe the experiments remarkably well. LANL EDS SIS LANLPUBL2001 SIS:2001 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Boer, D D'Alesio, U Murgia, F 054029 Phys. Rev. D 63 2001 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0008186 Access to fulltext document http://cds.cern.ch/record/453225/files/0008186.pdf Access to fulltext document http://cds.cern.ch/record/453225/files/0008186.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 200033 13 20100421 1409 CER01 20000818 PUBLIC 002204371CER ARTICLE Hidden 426960 SzGeCERN 20170828003419.0 oai:cds.cern.ch:426960 cerncds:FULLTEXT 2176199CERCER SLAC 4312457 SPIRES 4312457 Inspire 523934 hep-ph/0002144 eng Ashery, D The contribution of $\Sigma^* \to \Lambda\pi$ to measured $\Lambda$ polarization 2000 14 Feb 2000 6 p Calculations of the polarization of $\Lambda$ and $\bar{\Lambda}$ particlesafter fragmentation of a polarized quark produced in processes like $Z$-decayand deep inelastic polarized lepton scattering must include $\Lambda$ and$\bar{\Lambda}$ produced as decay products of $\Sigma^0$ and $\Sigma^*$ as wellas those produced directly. These decay contributions are significant and notfeasibly included in theoretical calculations based on QCD without additionalinput from other experimental data. Furthermore these contributions depend onthe spin structure of the $\Sigma^0$ or $\Sigma^*$ and are not directly relatedto the structure function of the $\Lambda$ LANL EDS SzGeCERN Particle Physics - Phenomenology CERN Sigma* PREPRINT Lipkin, Harry Jeannot http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0002144 Access to fulltext document http://cds.cern.ch/record/426960/files/0002144.fig.ps.gz Access to fulltext document http://cds.cern.ch/record/426960/files/0002144.pdf Access to fulltext document http://cds.cern.ch/record/426960/files/0002144.ps.gz Access to fulltext document ashery@tauphy.tau.ac.il Tel Aviv University Weizmann Institute and Tel Aviv University n 200007 11 20100421 1411 CER01 20000215 PUBLIC 002176199CER PREPRINT Hidden 424981 SzGeCERN 20170828003407.0 oai:cds.cern.ch:424981 cerncds:FULLTEXT 2174049CERCER SLAC 4304179 SPIRES 4304179 Inspire 523463 hep-ph/0001307 eng INFNCA-TH-2000-1 Anselmino, M $\Lambda$ and $\overline{\Lambda}$ polarization in polarized DIS 2000 We consider the polarization of Lambda + Lambda-bar baryons produced in polarized Deep Inelastic Scattering at leading order, with various spin configurations: longitudinally polarized leptons and unpolarized nucleon; unpolarized leptons and longitudinally or transversely polarized nucleons; longitudinally polarized leptons and nucleons. We show how the different results in the different cases are related to different aspects of the elementary dynamics and to the spin properties of the distribution and fragmentation functions and show how a combined analysis might give useful information. We give numerical results according to several sets of polarized fragmentation functions recently proposed. LANL EDS SIS LANLPUBL2001 SIS:2001 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE Boglione, M Murgia, F 253-262 Phys. Lett. B 481 2000 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0001307 Access to fulltext document http://cds.cern.ch/record/424981/files/0001307.pdf Access to fulltext document http://cds.cern.ch/record/424981/files/0001307.ps.gz Access to fulltext document francesco.murgia@ca. infn.it INFN and University, Cagliari, Italy University and INFN, Torino, Italy, Vrije Universiteit, Amsterdam, The Netherlands, n 200005 13 20100421 1411 CER01 20000201 PUBLIC 002174049CER ARTICLE Hidden 424282 SzGeCERN 20170828003402.0 oai:cds.cern.ch:424282 cerncds:FULLTEXT 2173282CERCER SLAC 4301471 SPIRES 4301471 Inspire 523300 hep-ph/0001259 eng CPT-3952 USM-TH-87 Ma, B Q $\Lambda$, $\overline{\Lambda}$ polarization and spin transfer in lepton deep-inelastic scattering 2000 Valparadíso Santa Maria Univ. Dept. Fís. 26 Jan 2000 25 p The flavor and helicity distributions of the $\Lambda$ and $\bar{\Lambda}$ hyperons for both valence and sea quarks are calculated in a perturbative QCD (pQCD) based model. We relate these quark distributions to the fragmentation functions of the $\Lambda$ and $\bar{\Lambda}$, and calculate the $z$- and $p_T$-dependence of the longitudinal spin transfer to the $\Lambda$ and spin transfer to the $\Lambda$ is compatible with the first HERMES results at DESY and further tests are suggested. We also make predictions for the $z$- and $p_T$-dependence of the $\Lambda$ and $\bar{\Lambda}$ longitudinal polarizations in neutrino (antineutrino) DIS processes. We investigate the sea contribution to the fragmentation functions, and we test a possible scenario where sea quarks in $\Lambda$ (or sea antiquarks in $\bar{\Lambda}$) are negatively polarized, whereas sea antiquarks in the $\Lambda$ (or sea quarks in fragmentation functions of sea quarks and antiquarks to $\Lambda$ and experiment at FNAL. LANL EDS SIS LANLPUBL2001 SIS:2001 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE Schmidt, I Soffer, J Yang Jian Jun Ma, Bo-Qiang Schmidt, Ivan Soffer, Jacques Yang, Jian-Jun 657-664 Eur. Phys. J. C 16 2000 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0001259 Access to fulltext document http://cds.cern.ch/record/424282/files/0001259.pdf Access to fulltext document http://cds.cern.ch/record/424282/files/0001259.ps.gz Access to fulltext document ischmidt@fis.utfsm.cl n 200004 13 20100421 1411 CER01 20000126 PUBLIC 002173282CER ARTICLE Hidden 406650 SzGeCERN 20171214170340.0 oai:cds.cern.ch:406650 cerncds:FULLTEXT 0333447CERCER SLAC 4242700 SPIRES 4242700 Inspire 509690 hep-ex/9911004 eng Adams, M R $\Lambda$ and $\overline{\Lambda}$ polarization from deep inelastic muon scattering 2000 We report results of the first measurements of Lambda and Antilambda polarization produced in deep inelastic polarized muon scattering on the nucleon. The results are consistent with an expected trend towards positive polarization with increasing x_F. The polarizations of Lambda and Antilambda appear to have opposite signs. A large negative polarization for Lambda at low positive x_F is observed and is not explained by existing models.A possible interpretation is presented. SIS LANLPUBL2000 LANL EDS SIS:2000 PR/LKR added SzGeCERN Particle Physics - Experiment ARTICLE LANL EDS High Energy Physics - Experiment 263-267 Eur. Phys. J. C 17 2000 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ex&id=9911004 Access to fulltext document http://cds.cern.ch/record/406650/files/9911004.pdf Access to fulltext document http://cds.cern.ch/record/406650/files/9911004.ps.gz Access to fulltext document ashery@tauphy.tau.ac.il n 199944 13 20100422 1356 CER01 19991105 PUBLIC 000333447CER ARTICLE Hidden 396622 SzGeCERN 20170828003204.0 oai:cds.cern.ch:396622 cerncds:FULLTEXT 0323015CERCER SLAC 4153081 SPIRES 4153081 Inspire 505554 hep-ph/9908355 eng Ashery, D Expected Polarization of $\Lambda$ particles produced in deep inelastic polarized lepton scattering 1999 We calculate the polarization of Lambda and Anti-Lambda particles produced in deep inelastic polarized lepton scattering. We use two models: the naive quark model and a model in which SU(3)$_F$ symmetry is used to deduce the spin structure of SU(3) octet hyperons from that of the proton. We perform the calculations for \la and \lab produced directly or as decay products of SIS LANLPUBL2001 LANL EDS SIS:2001 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE Lipkin, Harry Jeannot 263-269 Phys. Lett. B 469 1999 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=9908355 Access to fulltext document http://cds.cern.ch/record/396622/files/9908355.pdf Access to fulltext document ashery@alph04.triumf.ca n 199933 13 20100422 1357 CER01 19990816 PUBLIC 000323015CER ARTICLE Hidden 333328 SzGeCERN 20161219132247.0 oai:cds.cern.ch:333328 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN cerncds:hep-ph CERCER 0256903 SLAC 3618145 SPIRES 3618145 Inspire 448047 hep-ph/9709259 eng Kotzinian, A M Dubna, JINR Lambda polarization in lepton-induced reactions 1997 Geneva CERN 8 Sep 1997 7 p paper Different phenomenological approaches for Lambda and Lambda-bar polarization in polarized semi-inclusive deep inelastic scattering and electron-positron annihilation at Z^0 pole are considered. Current and future experiments will soon provide accurate enough data to study spin phenomena in these reactions and distinguish between various models. LANL EDS SzGeCERN Particle Physics - Phenomenology PREPRINT CERN Not applicable Not applicable CERN? CERN Central Library hep-ph/9709259 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=9709259 Access to fulltext document http://cds.cern.ch/record/333328/files/9709259.pdf Access to fulltext document aram.kotzinian@cern.ch n 199738 11 20101102 1145 CER01 19970908 334291 dubna970707a PUBLIC 0001 000256903CER PREPRINT ConferencePaper 319090 SzGeCERN 20180924175412.0 oai:cds.cern.ch:319090 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN cerncds:hep-ph 10.1007/s100520050142 DOI 0242079CERCER SPIRES 3495167 Inspire 439869 hep-ph/9701384 eng Kotzinian, A M $\Lambda$ and $\overline\Lambda$ Polarization in Lepton Induced Processes 1998 Geneva CERN paper The study of the longitudinal polarization of Lambda and Lambda-bar hyperons produced in polarized deep inelastic scattering, neutrino scattering, and in Z0 decays allows to access the spin dynamics of the quark fragmentation process. Different phenomenological spin transfer mechanisms are considered and predictions for the Lambda and Lambda-bar longitudinal polarization in various processes using unpolarized and polarized targets are made. Current and future semi-inclusive deep inelastic scattering experiments will provide soon accurate enough data to study these phenomena and distinguish between various models for the spin transfer mechanisms. SIS LANLPUBL2000 LANL EDS SIS:2000 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE CERN Not applicable Not applicable Bravar, A Von Harrach, D CERN? 329-337 Eur. Phys. J. C 2 1998 CERN Central Library hep-ph/9701384 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=9701384 Access to fulltext document http://cds.cern.ch/record/319090/files/9701384.pdf Access to fulltext document aram.kotzinian@cern.ch n 199706 y2005 13 20100426 0838 CER01 19970128 PUBLIC 0001 000242079CER ARTICLE 408091 SzGeCERN 20171214170349.0 oai:cds.cern.ch:408091 cerncds:FULLTEXT 0334925CERCER SLAC 4249046 SPIRES 4249046 Inspire 510115 hep-ex/9911017 eng DESY-99-151 Airapetian, A Measurement of Longitudinal Spin Transfer to $\Lambda$ Hyperons in Deep-Inelastic Lepton Scattering 1999 Hamburg DESY 16 Nov 1999 12 p Spin transfer in deep-inelastic Lambda electroproduction has been studied with the HERMES detector using the 27.5 GeV polarized positron beam in the HERA storage ring. For an average fractional energy transfer z=0.45, the measured longitudinal spin transfer from the virtual photon to the Lambda is 0.11 +/- 0.17 (stat) +/- 0.03 (sys). This quantity is expected to be sensitive to the up quark polarization in the Lambda hyperon and to the assumption of helicity conservation in the fragmentation process. The experimental result is interpreted in relation to various models of the Lambda spin content and found to favor the naive QPM. However, the present statistical precision is not yet sufficient to exclude a significant up quark polarization in the Lambda. LANL EDS SzGeCERN Particle Physics - Experiment PREPRINT LANL EDS High Energy Physics - Experiment HERMES Collaboration http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ex&id=9911017 Access to fulltext document http://cds.cern.ch/record/408091/files/9911017.figure2.ps.gz Access to fulltext document http://cds.cern.ch/record/408091/files/9911017.pdf Access to fulltext document http://cds.cern.ch/record/408091/files/9911017.ps.gz Access to fulltext document kinney@quentin.colorado.edu n 199946 11 20100422 1356 CER01 19991116 PUBLIC 000334925CER PREPRINT Hidden 390997 SzGeCERN 20170828003117.0 oai:cds.cern.ch:390997 cerncds:FULLTEXT 0317146CERCER SLAC 4096908 SPIRES 4096908 Inspire 501977 hep-ph/9906424 eng USM-TH-77 Ma, B Q Flavor and Spin Structure of $\Lambda$-Baryon at Large x 2000 Valparadíso Santa Maria Univ. Dept. Fís. 18 Jun 1999 11 p It is shown that perturbative QCD (pQCD) and the SU(6) quark-diquark model give significant different predictions concerning the flavor and spin structure for the quark distributions of the $\Lambda$-baryon near $x=1$. Detailed predictions for the ratios $u(x)/s(x)$ of unpolarized quark distributions, up and down quarks of the $\Lambda$ are given from the quark-diquark model and from a pQCD based model. It is found that the up and down quarks are positively polarized at large $x$, even though their net spin contributions to the between different predictions can provide clean tests of pQCD. SIS LANLPUBL2001 LANL EDS SIS:2001 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE Schmidt, I Yang Jian Jun Ma, Bo-Qiang Schmidt, Ivan Yang, Jian-Jun 107-113 Phys. Lett. B 477 2000 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=9906424 Access to fulltext document http://cds.cern.ch/record/390997/files/9906424.pdf Access to fulltext document mabq@hptc5.ihep.ac.cn n 199924 13 20100422 1358 CER01 19990618 PUBLIC 000317146CER ARTICLE Hidden 285350 SzGeCERN 20170828001431.0 DOI 10.1016/0370-2693(95)00927-D oai:cds.cern.ch:285350 cerncds:FULLTEXT 0205971CERCER SLAC 3186474 SPIRES 3186474 Inspire 397618 oai:arXiv.org:hep-ph/9507403 http://export.arxiv.org/oai2 2015-06-25 2015-06-26T08:51:08Z true arXiv hep-ph/9507403 eng Lu, W The strange quark spin of the proton in semi-inclusive $\Lambda$ leptoproduction 1995 25 Jul 1995 9 p paper Comments: 9 pages, revtex, no figures, to be published in Phys. Lett. B arXiv Considering the possible interpretation of the Ellis-Jaffe sum rule violation that the strange quark in the polarized proton is remarkably polarized in the opposite direction of the proton spin, we investigate its implication in the semi-inclusive \Lambda production in deep inelastic process with the electron beam unpolarized and proton target polarized longitudinally. As a result, we find that the measurement of the \Lambda polarization in the process considered can provide clean information about the strange quark spin distribution in the proton. LANL EDS SzGeCERN Particle Physics - Phenomenology Particle Physics - Experiment arXiv PREPRINT hep-ph LANL EDS hep-ex LANL EDS Ma, B Q Lu, Wei Ma, Bo Qiang Phys. Lett. B http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=9507403 Access to fulltext document http://cds.cern.ch/record/285350/files/9507403.pdf Access to fulltext document luw@bepc3.ihep.ac.cn n 199531 11 20100427 0930 CER01 19950726 PUBLIC 000205971CER PREPRINT Hidden 283107 SzGeCERN 20180924175621.0 oai:cds.cern.ch:283107 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN 10.1007/s002880050048 DOI CERN annual report 95-0755 SLAC 3163474 SPIRES 3163474 Inspire 396103 hep-ph/9506280 eng CERN Library TH-1995-135 CERN-TH-95-135 Ellis, Jonathan Richard CERN AUTHOR|(CDS)2108556 #BEARD# The proton spin puzzle and $\Lambda$ polarization in deep-inelastic scattering 1996 Geneva CERN 9 Jun 1995 17 p paper We point out that measurements of longitudinal \Lambda polarization in the target fragmentation region of deep--inelastic \nu \,N and \mu \,N or e \, N scattering may test dynamical mechanisms invoked to explain the proton spin puzzle. A previously-proposed model for polarized \bar s s pairs in the proton wave function reproduces successfully the negative \Lambda polarization found in the WA59 \bar \nu \, N experiment, and makes predictions that could be tested in future \mu \, N and e \, N experiments. CERN-TH LANL EDS OA SzGeCERN Particle Physics - Phenomenology ARTICLE CERN Not applicable Not applicable Kharzeev, Dima E Kotzinian, A M TH Ellis, John Kharzeev, Dmitri Kotzinian, Aram 467-474 Z. Phys. C 69 1996 CERN Central Library hep-ph/9506280 CERN ARC Library CERN-TH-95-135 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=9506280 Access to fulltext document http://cds.cern.ch/record/283107/files/9506280.fig1.pdf Access to fulltext document http://cds.cern.ch/record/283107/files/9506280.pdf Access to fulltext document ARAM@crnvma.cern.ch INFN, Trieste Phys. Inst. Yerevan Univ. Bielefeld n 199525 a1995 13 20100427 0931 CER01 19950612 PUBLIC 0002 000203330CER ARTICLE 278699 SzGeCERN 20160902074603.0 oai:cds.cern.ch:278699 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN DOI 10.1016/0370-2693(95)00789-N CERN annual report 95-0237 SLAC 3110303 SPIRES 3110303 Inspire 393479 oai:arXiv.org:hep-ph/9503333 http://export.arxiv.org/oai2 2016-09-01 2016-09-02T05:17:31Z arXiv false arXiv hep-ph/9503333 eng CERN Library TH-1995-048 CERN-TH-95-47 DOE-ER-40427-2004-N-95 Alberg, M A The proton spin puzzle and depolarization in $\overline{p}$p --> $\overline{\Lambda}\Lambda$ 1995 Geneva CERN 15 Mar 1995 7 p paper Comments: LaTeX file, 4 figures appended as uuencoded, compressed PostScript file arXiv We point out that the measurement of target spin depolarization D_{nn} in the \bar{p}p\to\bar{\Lambda}\Lambda reaction may test dynamical mechanisms invoked to explain the proton spin puzzle revealed by polarized deep--inelastic scattering experiments. In particular, models with {\it negatively} polarized \bar{s}s pairs in the proton wave function predict D_{nn}<0, whereas models with {\it positively} polarized gluons would predict D_{nn}>0. CERN-TH LANL EDS OA SzGeCERN Particle Physics - Phenomenology ARTICLE CERN Not applicable Not applicable hep-ph LANL EDS Ellis, Jonathan Richard CERN AUTHOR|(CDS)2108556 #BEARD# Kharzeev, Dima E TH Ellis, J Kharzeev, D 113-117 Phys. Lett. B 356 1995 CERN Central Library hep-ph/9503333 CERN ARC Library CERN TH 95-47 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=9503333 Access to fulltext document http://cds.cern.ch/record/278699/files/9503333.fig1.pdf Access to fulltext document 82490 16358 http://cds.cern.ch/record/278699/files/9503333.pdf Access to fulltext document 82489 267970 1241049 106534 http://cds.cern.ch/record/278699/files/arXiv:hep-ph_9503333.pdf kharzeev@vxcern.cern.ch Univ. Seattle Univ. Washington Seattle CERN Univ. Bielefeld n 199512 a1995 13 20100427 0933 CER01 19950316 PUBLIC 000198614CER ARTICLE 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 455653 SzGeCERN 20170828003654.0 oai:cds.cern.ch:455653 cerncds:FULLTEXT 2207525CERCER SLAC 4453034 SPIRES 4453034 Inspire 532553 hep-ph/0008295 eng CPT-4032 USM-TH-95 Ma, B Q The Flavor and Spin Structure of Hyperons from Quark Fragmentation 2000 Valparadíso Santa Maria Univ. Dept. Fís. 29 Aug 2000 32 p We systematically study the hadron longitudinal polarizations of the octet baryons at large $z$ from quark fragmentations in $e^+e^-$-annihilation, polarized charged lepton deep inelastic scattering (DIS) process, and neutrino (antineutrino) DIS process, based on predictions of quark distributions for the octet baryons in the SU(6) quark-spectator-diquark model and a perturbative QCD based counting rule analysis. We show that the $e^+e^-$-annihilation and polarized charged lepton DIS process are able to distinguish between the two different predictions of the hyperon polarizations. We also find that the neutrino/antineutrino DIS process is ideal in order to study both the valence content of the hyperons and the antiquark to hyperon (quark to anti-hyperon) fragmentations, which might be related to the sea content of hyperons. LANL EDS SIS LANLPUBL2001 SIS:2001 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Schmidt, I Soffer, J Yang Jian Jun Ma, Bo-Qiang Schmidt, Ivan Soffer, Jacques Yang, Jian-Jun 114009 Phys. Rev. D 62 2000 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0008295 Access to fulltext document http://cds.cern.ch/record/455653/files/0008295.pdf Access to fulltext document http://cds.cern.ch/record/455653/files/0008295.ps.gz Access to fulltext document mabq@phy.pku.edu.cn n 200035 13 20100421 1408 CER01 20000830 PUBLIC 002207525CER ARTICLE Hidden 439304 SzGeCERN 20170828003534.0 oai:cds.cern.ch:439304 cerncds:FULLTEXT 2189161CERCER SLAC 4393643 SPIRES 4393643 Inspire 527703 hep-ph/0005210 eng USM-TH-92 Ma, B Q The Quark-Antiquark Asymmetry of the Nucleon Sea from $\Lambda$ and $\bar{\Lambda}$ Fragmentation 2000 Valparadíso Santa Maria Univ. Dept. Fís. 22 May 2000 15 p We present a general analysis of the spin transfer for $\Lambda$ and $\bar{\Lambda}$ production in deep-inelastic scattering of polarized charged leptons on the nucleon, and find that the pattern of different behaviors of $\Lambda$ and $\bar{\Lambda}$ production observed by the E665 Collaboration suggests the possibility of quark-antiquark asymmetries either in the quark to $\Lambda$ fragmentation functions and/or in the quark and antiquark distributions of the target proton. We also point out that the strange-antistrange asymmetry of the nucleon sea may produce an observable contribution to the different behaviors of $\Lambda$ and $\bar{\Lambda}$ production. We find that a softer $\bar{s}(x)$ than $s(x)$ as predicted by the light-cone baryon-meson fluctuation model of intrinsic quark-antiquark pairs of the nucleon sea might lead to a reasonable picture. However, the magnitude is still too small to explain the E665 data and the conclusion has also strong model-dependence. This may suggest the importance of quark-antiquark asymmetry in the quark to $\Lambda$ fragmentation functions, provided that the E665 data are confirmed. LANL EDS SIS LANLPUBL2001 SIS:2001 PR/LKR added SzGeCERN Particle Physics - Phenomenology ARTICLE LANL EDS High Energy Physics - Phenomenology Schmidt, I Soffer, J Yang Jian Jun Ma, Bo-Qiang Schmidt, Ivan Soffer, Jacques Yang, Jian-Jun 293-299 Phys. Lett. B 489 2000 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0005210 Access to fulltext document http://cds.cern.ch/record/439304/files/0005210.pdf Access to fulltext document http://cds.cern.ch/record/439304/files/0005210.ps.gz Access to fulltext document mabq@phy.pku.edu.cn n 200021 13 20100421 1410 CER01 20000523 PUBLIC 002189161CER ARTICLE Hidden 369560 SzGeCERN 20170828002815.0 oai:cds.cern.ch:369560 cerncds:FULLTEXT 0294794CERCER SLAC 3879640 SPIRES 3879640 Inspire 478592 hep-ph/9810517 eng BIHEP-TH-98-8 CPT-3706 Ma, B Q Quark Flavor Separation in $\Lambda$-Baryon Fragmentation 1999 Beijing Acad. Sin. Inst. High Energy Phys. 30 Oct 1998 11 p It is shown that neutrino and antineutrino deep inelastic scattering of unpolarized and polarized $\Lambda$ and $\bar{\Lambda}$ productions, can provide a clean separation of unpolarized and polarized fragmentation functions of a quark into a $\Lambda$, for both light-flavor quarks and antiquarks and also for strange quarks. Combining with $\Lambda$ and $\bar{\Lambda}$ productions, in polarized electron deep inelastic scattering, one can systematically measure or check the various flavor and spin dependent fragmentation functions. Such measurements can provide crucial tests of different predictions concerning the spin structure of hadrons and the quark-antiquark asymmetry of the nucleon sea. SIS UNC99 LANL EDS SzGeCERN Particle Physics - Phenomenology ARTICLE Soffer, J Ma, Bo-Qiang Soffer, Jacques 2250 11 Phys. Rev. Lett. 82 1999 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=9810517 Access to fulltext document http://cds.cern.ch/record/369560/files/9810517.pdf Access to fulltext document mabq@hptc5.ihep.ac.cn n 199844 13 20100422 1401 CER01 19981030 PUBLIC 000294794CER ARTICLE Hidden