001059622 001__ 1059622
001059622 003__ SzGeCERN
001059622 005__ 20240307050103.0
001059622 0248_ $$aoai:cds.cern.ch:1059622$$pcerncds:CERN$$pcerncds:CERN:FULLTEXT$$pcerncds:FULLTEXT
001059622 0247_ $$2DOI$$a10.1103/PhysRevC.77.064908
001059622 035__ $$9arXiv$$aoai:arXiv.org:0709.4507
001059622 035__ $$9SPIRES$$a7400268
001059622 035__ $$9Inspire$$a762345
001059622 037__ $$9arXiv$$aarXiv:0709.4507$$cnucl-ex
001059622 041__ $$aeng
001059622 084__ $$2PACS$$a25.75.Gz
001059622 100__ $$aAlt, C.$$uFrankfurt U.
001059622 245__ $$aBose-Einstein correlations of $\pi^{-}\pi^{-}$ pairs in central Pb+Pb collisions at 20A,30A,40A,80A, and 158A GeV
001059622 246__ $$aBose-Einstein correlations of pion pairs in central Pb+Pb collisions at CERN SPS energies$$iPreprint title
001059622 260__ $$c2008
001059622 269__ $$c01 Oct 2007
001059622 300__ $$a22 p
001059622 500__ $$aComments: 22 pages, 23 figures
001059622 500__ $$9arXiv$$a22 pages, 23 figures
001059622 520__ $$aMeasurements of Bose--Einstein correlations of pion pairs in central Pb+Pb collisions were performed with the NA49 detector at the CERN SPS for beam energies of 20A, 30A, 40A, 80A, and 158A GeV. Correlation functions were measured in the longitudinally co-moving "out-side-long" refere nce frame as a function of rapidity and transverse momentum in the forward hemisphere of the reaction. Radius and correlation strength parameters were obtained from fits of a Gaussian parametrization. The results show a decrease of the radius parameters with increasing transverse momentum characteristic of strong radial flow in the pion source. No striking dependence on pion-pair rapidity or beam energy is observed. Static and dynamic properties of the pion source are obtained from simultaneous fits with a blast-wave model to radius parameters and midrapidity transverse momentum spectra. Predictions of hydrodynamic and microscopic models of Pb+Pb collisions are discussed.
001059622 520__ $$9arXiv$$aMeasurements of Bose-Einstein correlations of pion pairs in central Pb+Pb collisions were performed with the NA49 detector at the CERN SPS for beam energies of 20A, 30A, 40A, 80A, and 158A GeV. Correlation functions were measured in the longitudinally co-moving ``out-side-long'' reference frame as a function of rapidity and transverse momentum in the forward hemisphere of the reaction. Radius and correlation strength parameters were obtained from fits of a Gaussian parametrization. The results show a decrease of the radius parameters with increasing transverse momentum characteristic of strong radial flow in the pion source. No striking dependence on pion-pair rapidity or beam energy is observed. Static and dynamic properties of the pion source are obtained from simultaneous fits with a blast-wave model to radius parameters and midrapidity transverse momentum spectra. Predictions of hydrodynamic and microscopic models of Pb+Pb collisions are discussed.
001059622 595__ $$agiva
001059622 595__ $$aLANL EDS
001059622 65017 $$2SzGeCERN$$aNuclear Physics - Experiment
001059622 690C_ $$aARTICLE
001059622 690C_ $$aCERN
001059622 693__ $$aCERN SPS$$eNA49
001059622 695__ $$9LANL EDS$$anucl-ex$$aNuclear Experiment
001059622 700__ $$aAnticic, T.$$uBoskovic Inst., Zagreb
001059622 700__ $$aBaatar, B.$$uDubna, JINR
001059622 700__ $$aBarna, D.$$uBudapest, RMKI
001059622 700__ $$aBartke, J.$$uCracow, INP
001059622 700__ $$aBetev, L.$$uCERN
001059622 700__ $$aBialkowska, H.$$uWarsaw, Inst. Nucl. Studies
001059622 700__ $$aBlume, C.$$uFrankfurt U.
001059622 700__ $$aBoimska, B.$$uWarsaw, Inst. Nucl. Studies
001059622 700__ $$aBotje, M.$$uNIKHEF, Amsterdam
001059622 700__ $$aBracinik, J.$$uComenius U.
001059622 700__ $$aBramm, R.$$uFrankfurt U.
001059622 700__ $$aBuncic, P.$$uCERN
001059622 700__ $$aCerny, V.$$uComenius U.
001059622 700__ $$aChristakoglou, P.$$uAthens U.
001059622 700__ $$aChung, P.$$uSUNY, Stony Brook, Chem. Dept.
001059622 700__ $$aChvala, O.$$uCharles U.
001059622 700__ $$aCramer, J.G.$$uWashington U., Seattle
001059622 700__ $$aCsato, P.$$uBudapest, RMKI
001059622 700__ $$aDinkelaker, P.$$uFrankfurt U.
001059622 700__ $$aEckardt, V.$$uMunich, Max Planck Inst.
001059622 700__ $$aFlierl, D.$$uFrankfurt U.
001059622 700__ $$aFodor, Z.$$uBudapest, RMKI
001059622 700__ $$aFoka, P.$$uDarmstadt, GSI
001059622 700__ $$aFriese, V.$$uDarmstadt, GSI
001059622 700__ $$aGal, J.$$uBudapest, RMKI
001059622 700__ $$aGazdzicki, M.$$uFrankfurt U.$$uJan Kochanowski U.
001059622 700__ $$aGenchev, V.$$uSofiya, Inst. Nucl. Res.
001059622 700__ $$aGeorgopoulos, G.$$uAthens U.
001059622 700__ $$aGladysz, E.$$uCracow, INP
001059622 700__ $$aGrebieszkow, K.$$uWarsaw U. of Tech.
001059622 700__ $$aHegyi, S.$$uBudapest, RMKI
001059622 700__ $$aHohne, C.$$qHoehne, C.$$uDarmstadt, GSI
001059622 700__ $$aKadija, K.$$uBoskovic Inst., Zagreb
001059622 700__ $$aKarev, A.$$uMunich, Max Planck Inst.
001059622 700__ $$aKikola, D.$$uWarsaw U. of Tech.
001059622 700__ $$aKliemant, M.$$uFrankfurt U.
001059622 700__ $$aKniege, S.$$uFrankfurt U.
001059622 700__ $$aKolesnikov, V.I.$$uDubna, JINR
001059622 700__ $$aKornas, E.$$uCracow, INP
001059622 700__ $$aKorus, R.$$uJan Kochanowski U.
001059622 700__ $$aKowalski, M.$$uCracow, INP
001059622 700__ $$aKraus, I.$$uDarmstadt, GSI
001059622 700__ $$aKreps, M.$$uComenius U.
001059622 700__ $$aLaszlo, A.$$uBudapest, RMKI
001059622 700__ $$aLacey, R.$$uSUNY, Stony Brook, Chem. Dept.
001059622 700__ $$avan Leeuwen, M.$$uNIKHEF, Amsterdam
001059622 700__ $$aLevai, P.$$uBudapest, RMKI
001059622 700__ $$aLitov, L.$$uSofiya U.
001059622 700__ $$aLungwitz, B.$$uFrankfurt U.
001059622 700__ $$aMakariev, M.$$uSofiya U.
001059622 700__ $$aMalakhov, A.I.$$uDubna, JINR
001059622 700__ $$aMateev, M.$$uSofiya U.
001059622 700__ $$aMelkumov, G.L.$$uDubna, JINR
001059622 700__ $$aMischke, A.$$uNIKHEF, Amsterdam
001059622 700__ $$aMitrovski, M.$$uFrankfurt U.
001059622 700__ $$aMolnar, J.$$uBudapest, RMKI
001059622 700__ $$aMrowczynski, St.$$uJan Kochanowski U.
001059622 700__ $$aNicolic, V.$$uBoskovic Inst., Zagreb
001059622 700__ $$aPalla, G.$$uBudapest, RMKI
001059622 700__ $$aPanagiotou, A.D.$$uAthens U.
001059622 700__ $$aPanayotov, D.$$uSofiya U.
001059622 700__ $$aPetridis, A.$$uAthens U.
001059622 700__ $$aPeryt, W.$$uWarsaw U. of Tech.
001059622 700__ $$aPikna, M.$$uComenius U.
001059622 700__ $$aPluta, J.$$uWarsaw U. of Tech.
001059622 700__ $$aPrindle, D.$$uWashington U., Seattle
001059622 700__ $$aPuhlhofer, F.$$qPuehlhofer, F.$$uPhilipps U. Marburg
001059622 700__ $$aRenfordt, R.$$uFrankfurt U.
001059622 700__ $$aRoland, C.$$uMIT
001059622 700__ $$aRoland, G.$$uMIT
001059622 700__ $$aRybczynski, M.$$uJan Kochanowski U.
001059622 700__ $$aRybicki, A.$$uCracow, INP$$uCERN
001059622 700__ $$aSandoval, A.$$uDarmstadt, GSI
001059622 700__ $$aSchmitz, N.$$uMunich, Max Planck Inst.
001059622 700__ $$aSchuster, T.$$uFrankfurt U.
001059622 700__ $$aSeyboth, P.$$uMunich, Max Planck Inst.
001059622 700__ $$aSikler, F.$$uBudapest, RMKI
001059622 700__ $$aSitar, B.$$uComenius U.
001059622 700__ $$aSkrzypczak, E.$$uWarsaw U.
001059622 700__ $$aSlodkowski, M.$$uWarsaw U. of Tech.
001059622 700__ $$aStefanek, G.$$uJan Kochanowski U.
001059622 700__ $$aStock, R.$$uFrankfurt U.
001059622 700__ $$aStrabel, C.$$uFrankfurt U.
001059622 700__ $$aStrobele, H.$$qStroebele, H.$$uFrankfurt U.
001059622 700__ $$aSusa, T.$$uBoskovic Inst., Zagreb
001059622 700__ $$aSzentpetery, I.$$uBudapest, RMKI
001059622 700__ $$aSziklai, J.$$uBudapest, RMKI
001059622 700__ $$aSzuba, M.$$uWarsaw U. of Tech.
001059622 700__ $$aSzymanski, P.$$uCERN$$uWarsaw, Inst. Nucl. Studies
001059622 700__ $$aTrubnikov, V.$$uWarsaw, Inst. Nucl. Studies
001059622 700__ $$aVarga, D.$$uBudapest, RMKI$$uCERN
001059622 700__ $$aVassiliou, M.$$uAthens U.
001059622 700__ $$aVeres, G.I.$$uBudapest, RMKI$$uMIT
001059622 700__ $$aVesztergombi, G.$$uBudapest, RMKI
001059622 700__ $$aVranic, D.$$uDarmstadt, GSI
001059622 700__ $$aWetzler, A.$$uFrankfurt U.
001059622 700__ $$aWlodarczyk, Z.$$uJan Kochanowski U.
001059622 700__ $$aWojtaszek, A.$$uJan Kochanowski U.
001059622 700__ $$aYoo, I.K.$$uPusan Natl. U.
001059622 700__ $$aZimanyi, J.$$uBudapest, RMKI
001059622 710__ $$gNA49 Collaboration
001059622 773__ $$c064908$$pPhys. Rev. C$$v77$$y2008
001059622 8564_ $$uhttp://arxiv.org/pdf/0709.4507.pdf
001059622 8564_ $$uhttp://doc.cern.ch//archive/electronic/aps/PhysRevC.77.064908.pdf$$yAPS Published version, local copy
001059622 8564_ $$8491101$$s626608$$uhttps://cds.cern.ch/record/1059622/files/PhysRevC.77.064908.pdf$$yAPS Published version, local copy
001059622 8564_ $$81263691$$s578982$$uhttps://cds.cern.ch/record/1059622/files/arXiv:0709.4507.pdf
001059622 8564_ $$81263678$$s18366$$uhttps://cds.cern.ch/record/1059622/files/fig1_NA49_setup_pb_new.png$$y00000 (Color online)~The NA49 experiment: beam position detectors BPD, target foil T, time of flight detectors TOF, time projection chambers TPC, and calorimeters CAL. Details can be found in \cite{Afanasev:1999iu}.
001059622 8564_ $$81263679$$s34659$$uhttps://cds.cern.ch/record/1059622/files/fig23_FIT_PARAM_ALLEN.png$$y00023 (Color online)~Energy dependence of the model parameters $T$, $\rho_{0}$, $\tau_0$, $\Delta\tau$, and $R_{geo}$. Input to the fit procedure are the spectra of $\pi^{-}$ and protons, and the radii. Open symbols correspond to a fit of only the spectra, disregarding the radii. Further details and references are given in the text.
001059622 8564_ $$81263680$$s7688$$uhttps://cds.cern.ch/record/1059622/files/fig4_DCA_Det_nrows.png$$y00004 (Color online)~Schematic description of the anti-merging cut: two tracks have to be separated by more than $\Delta s = 2.2$ cm at more than $n_{rows} = 50$ consecutive padrows.
001059622 8564_ $$81263681$$s39959$$uhttps://cds.cern.ch/record/1059622/files/fig16_Rap_Dep_kt0.png$$y00016 Dependence of the fit parameters on rapidity at low $k_{t}$ at different beam energies. Filled symbols correspond to $0.0\!<\!k_{t}\!<0.1\!$~GeV/c, open symbols to ${0.1<k_{t}<0.2}$~GeV/c.
001059622 8564_ $$81263682$$s14464$$uhttps://cds.cern.ch/record/1059622/files/fig3_DCA_examles_new_rows.png$$y00003 (Color online)~Projections of the correlation function on the $q_{out}$ component at 158$A$~GeV beam energy at midrapidity in the transverse momentum bin $0.3<k_{t}<0.4$~GeV/c. Left hand side: requiring a distance of closest approach DCA of 1.6~cm at 10 consecutive padrows, at the right hand side: a DCA of 2.2~cm was required at 70 padrows.
001059622 8564_ $$81263683$$s23163$$uhttps://cds.cern.ch/record/1059622/files/fig20_Rapdep_at_one_kt.png$$y00020 (Color online)~Dependence of the BE radii on $dn/dY$ in central PbPb (AuAu) collisions. Closed symbol correspond to measurements at midrapidity, squares correspond to AGS energies, circles to SPS energies, and triangles to RHIC energies. Open symbols represent NA49 data at forward rapidity $1.0<Y_{\pi\pi}<1.5$. All radii have been interpolated to get values at $k_{t}= 0.2$~GeV/c.
001059622 8564_ $$81263684$$s32957$$uhttps://cds.cern.ch/record/1059622/files/fig9_PionsKaonsOnly.png$$y00009 (Color online)~Rapidity distributions of negative pions and kaons and the antiproton yield at midrapidity at SPS energies. Open symbols indicate reflected values \cite{Afanasiev:2002mx,Gazdzicki:2004ef,Alt:2006dk}. Data at 20{\it A} and 30{\it A} GeV are preliminary results.
001059622 8564_ $$81263685$$s23848$$uhttps://cds.cern.ch/record/1059622/files/fig13_DifferentCoulombs.png$$y00013 (Color online)~Fit parameters (158$A$ GeV, midrapidity) using various values for the mean pair separation $\langle r^{\ast} \rangle$ in the Coulomb correction procedure. Note the different scales on the the vertical axes.
001059622 8564_ $$81263686$$s10390$$uhttps://cds.cern.ch/record/1059622/files/fig10_HBT_radii_w-wo_PID.png$$y00010 (Color online)~$k_{t}$ dependence of fit parameters at midrapidity at 158{\it A} GeV with and without particle identification.
001059622 8564_ $$81263687$$s11625$$uhttps://cds.cern.ch/record/1059622/files/fig12_Purity_Radii_160.png$$y00012 (Color online)~$k_{t}$ dependence of fit parameters at midrapidity at 158{\it A} GeV assuming different values for the purity factor.
001059622 8564_ $$81263688$$s39916$$uhttps://cds.cern.ch/record/1059622/files/fig15_kt_at_SPS.png$$y00015 Dependence of fit parameters on $k_{t}$ at midrapidity for different beam energies. Full dots show results from this analysis, open circles indicate measurements of NA45 \cite{Adamova:2002wi}.
001059622 8564_ $$81263689$$s25601$$uhttps://cds.cern.ch/record/1059622/files/fig14_kt.png$$y00014 Dependence of fit parameters on $k_{t}$ at midrapidity at 158{\it A} GeV beam energy. Open symbols indicate measurements by other experiments \cite{Bearden:1998aq,Antinori:2001yi,Rosselet:2002ru,Adamova:2002wi}.
001059622 8564_ $$81263690$$s36868$$uhttps://cds.cern.ch/record/1059622/files/fig22_FIT_HBT_SPS.png$$y00022 (Color online)~$k_{t}$-dependence of the radius parameters in central PbPb collisions at midrapidity (data points) compared to fit results (lines).
001059622 8564_ $$81263692$$s27310$$uhttps://cds.cern.ch/record/1059622/files/fig19_EnDep_at_one_kt_back.png$$y00019 (Color online)~Dependence of the BE radii, the ratio $R_{out}/R_{side}$ and the volume $V_{f}$ in central PbPb (AuAu) collisions on beam energy at midrapidity. The $k_{t}$-dependence (Fig.~\ref{fig:world_data}) has been interpolated to get numerical values of the radii at $k_{t}=0.2$ GeV/c.
001059622 8564_ $$81263693$$s38274$$uhttps://cds.cern.ch/record/1059622/files/fig17_Rap_Dep_kt2.png$$y00017 Dependence of the fit parameters on rapidity at high $k_{t}$ at different beam energies. Filled symbols correspond to ${0.2<k_{t}<0.3}$~GeV/c, open symbols to $0.3<k_{t}<0.4$~GeV/c.
001059622 8564_ $$81263694$$s50065$$uhttps://cds.cern.ch/record/1059622/files/fig7_ExampleProjections.png$$y00007 (Color online)~Projections of correlations functions at midrapidity at three different beam energies at low ($0.0<k_{t}<0.1$~GeV/c) and high ($0.4<k_{t}<0.6$~GeV/c) transverse momentum. The projected components have been integrated over 50 MeV/c. The curves show the projections of the fits of Eq.~\ref{eq:finalfitting} to the data.
001059622 8564_ $$81263695$$s25671$$uhttps://cds.cern.ch/record/1059622/files/fig11_Purity_all_160GeV_KtY_Pal1.png$$y00011 (Color online)~The purity factor $p$ as function of $Y_{\pi\pi}$ and $k_{t}$ derived from simulations at 158{\it A} GeV beam energy.
001059622 8564_ $$81263696$$s17632$$uhttps://cds.cern.ch/record/1059622/files/fig18_worlddata.png$$y00018 (Color online)~Summary of the $k_{t}$ dependence of the radii at various center of mass energies at midrapidity. Data are from AGS \cite{Lisa:2000hw} (squares), this NA49 analysis (circles), PHOBOS \cite{Back:2004ug} (triangles at $\sqrt{s_{NN}}=62$~GeV), and STAR \cite{Adler:2001zd,Adams:2004yc} (triangles at $\sqrt{s_{NN}}=130,200$~GeV).
001059622 8564_ $$81263697$$s7883$$uhttps://cds.cern.ch/record/1059622/files/fig6_SplitTracks_onetrackgap.png$$y00006 (Color online)~Schematic description of a split track: a single track (dashed line) is reconstructed as two different tracks (solid lines).
001059622 8564_ $$81263698$$s24029$$uhttps://cds.cern.ch/record/1059622/files/fig5_RoutDCA_Pal1_rows.png$$y00005 (Color online)~Dependence of the parameter $R_{out}$ on the minimum separation $\Delta s$ and on the required number of rows, at midrapidity at $0.3<k_{t}<0.4$~GeV/c for the 158$A$~GeV beam energy sample.
001059622 8564_ $$81263699$$s16600$$uhttps://cds.cern.ch/record/1059622/files/fig8_HBT_radii_w-wo_MomRes.png$$y00008 (Color online)~Fitted radii with (triangles up) and without (triangles down) momentum semearing at midrapidity at 20{\it A} (upper) and 158{\it A} GeV (lower row) respectively.
001059622 8564_ $$81263700$$s53966$$uhttps://cds.cern.ch/record/1059622/files/fig21_FIT_SPEC_SPS.png$$y00021 (Color online)~Transverse mass spectra of pions, kaons, and protons in central PbPb collisions at midrapidity measured by NA49. m$_0$ is the particle rest mass. Lines indicate the fit results, numerical values of the fit parameters $T$ and $\rho_{0}$ are also shown. Further details are given in the text.
001059622 8564_ $$81263701$$s41336$$uhttps://cds.cern.ch/record/1059622/files/fig2_KTY_Draw_Paper_20_160_new.png$$y00001 (Color online)~Raw yields of particle pairs at 20$A$ and 158$A$ GeV beam energy as a function of ${Y_{\pi\pi}}$ and ${k_{t}}$.
001059622 8564_ $$82516077$$s9563$$uhttps://cds.cern.ch/record/1059622/files/fig00002.png$$y00002 noimgData sets used in this analysis.
001059622 901__ $$uNIKHEF, Amsterdam
001059622 901__ $$uAthens U.
001059622 901__ $$uComenius U.
001059622 901__ $$uBudapest, RMKI
001059622 901__ $$uMIT
001059622 901__ $$uCracow, INP
001059622 901__ $$uDarmstadt, GSI
001059622 901__ $$uDubna, JINR
001059622 901__ $$uFrankfurt U.
001059622 901__ $$uCERN
001059622 901__ $$uJan Kochanowski U.
001059622 901__ $$uMarburg U.
001059622 901__ $$uMunich, Max Planck Inst.
001059622 901__ $$uCharles U.
001059622 901__ $$uPusan Natl. U.
001059622 901__ $$uWashington U., Seattle
001059622 901__ $$uSofiya U.
001059622 901__ $$uSofiya, Inst. Nucl. Res.
001059622 901__ $$uSUNY, Stony Brook, Chem. Dept.
001059622 901__ $$uInstitute for Nuclear Studies, Warsaw, Poland
001059622 901__ $$uWarsaw, Inst. Nucl. Studies
001059622 901__ $$uWarsaw U. of Tech.
001059622 901__ $$uBoskovic Inst., Zagreb
001059622 916__ $$sn$$w200740$$ya2008
001059622 960__ $$a13
001059622 961__ $$c20100412$$h1514$$lCER01$$x20071001
001059622 963__ $$aPUBLIC
001059622 970__ $$a002716414CER
001059622 980__ $$aARTICLE