Strange particle production and elliptic flow from CERES

Elliptic flow measurements as a function of pT of charged (π± and low-pT protons) and strange (Λ and K0S) particles from Pb+Au collisions at 158A GeV/c are presented, together with measurements of and K0S meson production. A mass ordering effect was observed. Scaling to the number of constituent quarks and transverse rapidity yfsT scaling are presented. The results are compared with results from the NA49 and STAR experiments and with hydrodynamical calculations. For the first time in heavy-ion collisions, mesons were reconstructed in the same experiment both in the K+K− and in the e+ e− decay channels. The obtained transverse mass distributions of mesons are compared with results from the NA49 and NA50 experiments. The yield and the inverse slope parameter of the K0S mesons were reconstructed from two independent analyses. Our results are compared with those from the NA49 and NA57 experiments.

[1]  G. Stefanek.  Elliptic flow of Λ hyperons in Pb+Pb collisions at 158 A GeV , 2006 .

[2]  K. Filimonov,et al.  Leptonic and charged kaon decay modes of the phi meson measured in heavy-ion collisions at the CERN super proton synchrotron. , 2005, Physical review letters.

[3]  D. Miśkowiec.  Collection of CERES Results , 2005, nucl-ex/0511010.

[4]  J. Milosevic.  Strange and charged particle elliptic flow in Pb+Au collisions at 158 AGeV/c , 2005, nucl-ex/0510057.

[5]  E. al.,et al.  Rapidity distributions around mid-rapidity of strange particles in Pb–Pb collisions at 158 A GeV/c , 2005, nucl-ex/0509009.

[6]  F. Antinori,et al.  Hot Quarks 2004 , 2005 .

[7]  K. J. Foley,et al.  Particle-type dependence of azimuthal anisotropy and nuclear modification of particle production in Au plus Au collisions at root s(NN)=200 GeV , 2004 .

[8]  B. Lorstad,et al.  Buda-Lund hydro model for ellipsoidally symmetric fireballs and the elliptic flow at RHIC , 2003, nucl-th/0310040.

[9]  T. CsorgHo,et al.  Observables and initial conditions for self-similar ellipsoidal flows , 2001, hep-ph/0108067.

[10]  K. J. Foley,et al.  Azimuthal anisotropy of K(0)(S) and Lambda+Lambda production at midrapidity from Au+Au collisions at sqrt[s(NN)]=130 GeV. , 2002, Physical review letters.

[11]  D. Røhrich.  Review of SPS experimental results on strangeness , 2001 .

[12]  H. Heiselberg,et al.  Elliptic flow at SPS and RHIC: From kinetic transport to hydrodynamics , 2000, hep-ph/0012137.

[13]  París,et al.  Effects of HBT correlations on flow measurements , 1999, nucl-th/9912013.

[14]  R. Rapp,et al.  Chiral Symmetry Restoration and Dileptons in Relativistic Heavy-Ion Collisions , 1999, hep-ph/9909229.

[15]  U. Heinz,et al.  Anisotropic flow from AGS to LHC energies , 1999, nucl-th/9906003.

[16]  A.M.Poskanzer,et al.  Methods for analyzing anisotropic flow in relativistic nuclear collisions , 1998, nucl-ex/9805001.

[17]  T. Csorgo,et al.  Bose-Einstein correlations for three-dimensionally expanding, cylindrically symmetric, finite systems. , 1996, Physical review. C, Nuclear physics.

[18]  Rao,et al.  Observation of anisotropic event shapes and transverse flow in ultrarelativistic Au+Au collisions. , 1994, Physical review letters.

[19]  J. Ollitrault,et al.  Anisotropy as a signature of transverse collective flow. , 1992, Physical review. D, Particles and fields.

[20]  Yuan,et al.  Production of soft dileptons in the quark-gluon plasma. , 1990, Physical review letters.

[21]  Johann Rafelski,et al.  Strangeness in relativistic heavy ion collisions , 1986 .

[22]  N. S. Barnett,et al.  Private communication , 1969 .

[23]  J. Meigs,et al.  WHO Technical Report , 1954, The Yale Journal of Biology and Medicine.