Energy Dependence of $\Lambda$ and $\bar{\Lambda }$ Production at CERN-SPS Energies

Abstract

Rapidity distributions for $\Lambda$ and $\bar{\Lambda }$ hyperons in central Pb-Pb collisions at 40, 80 and 158 A$\cdot$GeV and for ${\mathrm{K}}_s^0$ mesons at 158 A$\cdot$GeV are presented. The lambda multiplicities are studied as a function of collision energy together with AGS and RHIC measurements and compared to model predictions. A different energy dependence of the $\Lambda /\pi$ and $\bar{\Lambda }/\pi$ is observed. The $\bar{\Lambda }/\Lambda$ ratio shows a steep increase with collision energy. Evidence for a $\bar{\Lambda }/\bar{\mathrm{p}}$ ratio greater than 1 is found at 40 A$\cdot$GeV.

6 pages, 9 figures, QM2002 proceedings, submitted to Nucl. Phys. A

References in corpus (6)

• Maximum Relative Strangeness Content in Heavy Ion Collisions Around 30 A.GeV
• Production and collective behavior of strange particles in Au + Au collisions at 2--8 AGeV
• Antilambda production in Au+Au collisions at 11.7 A GeV/c
• Lambda production in central Pb+Pb collisions at CERN-SPS energies
• Strange Meson Enhancement in PbPb Collisions
• STAR Strangeness Results from sqrt(s_NN) = 130 GeV Au+Au Collisions (and first results from 200 GeV)

Cited by in corpus (29)

• Transport-theoretical Description of Nuclear Reactions
• Energy and system size dependence of chemical freeze-out in relativistic nuclear collisions
• Chemical equilibrium study in nucleus-nucleus collisions at relativistic energies
• Strangeness dynamics and transverse pressure in relativistic nucleus-nucleus collisions
• Parton-Hadron-Quantum-Molecular Dynamics (PHQMD) -- A Novel Microscopic N-Body Transport Approach for Heavy-Ion Collisions, Dynamical Cluster Formation and Hypernuclei Production
• $\Lambda$ and $\bar{\Lambda }$ Production in Central Pb-Pb Collisions at 40, 80, and 158 A$\cdot$GeV
• Hadron Production and Phase Changes in Relativistic Heavy Ion Collisions
• Transverse Activity of Kaons and the Deconfinement Phase Transition in Nucleus--Nucleus Collisions
• Strange anti-particle to particle ratios at mid-rapidity in sqrt(s_NN)= 130 GeV Au+Au Collisions
• Relativistic Nucleus-Nucleus Collisions: from the BEVALAC to RHIC
• Three-body collisions in Boltzmann-Uehling-Uhlenbeck theory
• Hadron production by quark combination in central Pb+Pb collisions at $\sqrt{s_{NN}}=17.3$ GeV
• Kaon and Pion production in relativistic heavy-ion collisions
• Inhomogeneous freeze-out in relativistic heavy-ion collisions
• Strangeness dynamics in relativistic nucleus-nucleus collision
• Strangeness and Quark Gluon Plasma
• A comprehensive description of multiple observables in heavy-ion collisions at SPS
• Correlating Strangeness Enhancement and J/psi Suppression in Heavy Ion Collisions at sqrt(s)_NN = 17.2 GeV
• Statistical Hadronization as a Snapshot of a dynamical Fireball Evolution
• Separate mass scaling of the widths of the rapidity distributions for mesons and baryons at energies available at the Facility for Antiproton and Ion research
• Strangeness and Quark--Gluon Plasma
• Hadronic Rapidity Spectra in Heavy Ion Collisions at SPS and AGS energies in a Quark Combination Model
• Role of net baryon density on rapidity width of identified particles from the lowest energies available at the CERN Super Proton Synchrotron to those at the BNL Relativistic Heavy Ion Collider and at the CERN Large Hadron Collider
• Strangeness Saturation: Dependence on System-Size, Centrality and Energy
• Phase-Space Description of Momentum Spectra in Relativistic Heavy-Ion Collisions
• Chemical equilibrium study at SPS 158A GeV
• Evolution of the concept of Quark Matter: the Ianus face of the heavy ion collisions
• Lambda and Phi Production in Heavy Ion Collisions
• Multistrange Hyperon Production in Pb+Pb collisions at 30, 40, 80 and 158 A$\cdot$GeV