PACIAE, a parton and hadron cascade model, is utilized to systematically investigate strange particle production and strangeness enhancement in Au＋Au collisions and in Pb＋Pb collisions with the √SNN = 200 GeV at th...PACIAE, a parton and hadron cascade model, is utilized to systematically investigate strange particle production and strangeness enhancement in Au＋Au collisions and in Pb＋Pb collisions with the √SNN = 200 GeV at the RHIC and 2.76 TeV at the LHC, respectively. The experimental results at different centralities, using data from the STAR collaboration and the ALICE collaboration, are well described by the PACIAE model. This may represent the importance of the parton and hadron rescatterings, as well as the reduction mechanism for strange quark suppression, that are implemented in the PACIAE model.展开更多
The rapidity densities at mid-rapidity and the transverse momentum distributions for strange hadrons produced in pp collisions are analyzed using the modified PACIAE model by considering the effect of inelastic （re）...The rapidity densities at mid-rapidity and the transverse momentum distributions for strange hadrons produced in pp collisions are analyzed using the modified PACIAE model by considering the effect of inelastic （re）scattering processes ss -→gg and gg→ss in parton （re）scattering. The calculated results of the transverse momentum spectra of the strangeness fitting with data measured by STAR and ALICE Collaborations can be improved, especially at large transverse momentum levels. This demonstrates that the effect of inelastic （re）scattering processes of ss→gg and gg→ss is not negligible at RHIC and LHC energy levels.展开更多
The parton and hadron cascade model PACIAE is used to investigate strange particle production in Au ＋ Au collisions at √s = 62.4 GeV in different centralities and at √s =39, 11.5 and 7.7 GeV in the most central col...The parton and hadron cascade model PACIAE is used to investigate strange particle production in Au ＋ Au collisions at √s = 62.4 GeV in different centralities and at √s =39, 11.5 and 7.7 GeV in the most central collision, respectively. It is shown that the transverse momentum distributions of strange particles by the PACIAE model fit the RHIC Beam Energy Scan experimental results well.展开更多
基金Supported by National Natural Science Foundation of China(11247021,10975091)Excellent Youth Foundation of Hubei Scientific Committee(2006ABB036)Key Laboratory Foundation of Quark and Lepton Physics(Hua-Zhong Normal University)(QLPL201101)
文摘PACIAE, a parton and hadron cascade model, is utilized to systematically investigate strange particle production and strangeness enhancement in Au＋Au collisions and in Pb＋Pb collisions with the √SNN = 200 GeV at the RHIC and 2.76 TeV at the LHC, respectively. The experimental results at different centralities, using data from the STAR collaboration and the ALICE collaboration, are well described by the PACIAE model. This may represent the importance of the parton and hadron rescatterings, as well as the reduction mechanism for strange quark suppression, that are implemented in the PACIAE model.
基金Supported by National Natural Science Foundation of China (10975091)Excellent Youth Foundation of Hubei Scientific Committee (2006ABB036)Education Commission of Hubei Province of China (Z20081302)
文摘The rapidity densities at mid-rapidity and the transverse momentum distributions for strange hadrons produced in pp collisions are analyzed using the modified PACIAE model by considering the effect of inelastic （re）scattering processes ss -→gg and gg→ss in parton （re）scattering. The calculated results of the transverse momentum spectra of the strangeness fitting with data measured by STAR and ALICE Collaborations can be improved, especially at large transverse momentum levels. This demonstrates that the effect of inelastic （re）scattering processes of ss→gg and gg→ss is not negligible at RHIC and LHC energy levels.
基金Supported by National Natural Science Foundation of China(11475068,11247021)Excellent Youth Foundation of Hubei Scientific Committee(2006ABB036)Key Laboratory foundation of Quark and Lepton Physics(Hua-Zhong Normal University)(QLPL2014P01)
文摘The parton and hadron cascade model PACIAE is used to investigate strange particle production in Au ＋ Au collisions at √s = 62.4 GeV in different centralities and at √s =39, 11.5 and 7.7 GeV in the most central collision, respectively. It is shown that the transverse momentum distributions of strange particles by the PACIAE model fit the RHIC Beam Energy Scan experimental results well.
