Strange quark suppression and strange hadron production in pp collisions at energies available at the BNL Relativistic Heavy Ion Collider and the CERN Large Hadron Collider

Strange quark suppression and strange hadron production in pp collisions at energies available at the BNL Relativistic Heavy Ion Collider and the CERN Large Hadron Collider
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BNL 相对论重离子对撞机和 CERN 大型强子对撞机可用能量下的 pp 碰撞中奇异夸克抑制和奇异强子产生

DOI:
10.1103/physrevc.84.034905
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发表时间:
2011-03
期刊:
Physical Review C (nuclear Physics)
影响因子:
--
通讯作者:
Ben-Hao Sa
Ben-Hao Sa
中科院分区:
其他
文献类型:
--
作者:
Hai-Yan Long;Sheng-Qin Feng;Dai-Mei Zhou;Yu-Liang Yan;Hai-Liang Ma;Ben-Hao Sa

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利用基于PYTHIA的部分子和强子级联模型PACIAE,系统地研究了在BNL相对论重离子对撞机(RHIC)和CERN大型强子对撞机(LHC)上可利用能量下pp碰撞中奇异粒子的产生.从整体上看,PACIAE的中快度奇异粒子快度密度和横向动量分布的结果优于PYTHIA(缺省)的结果,并与星星和ALICE的实验数据进行了比较。这可能代表了部分子和强子再散射的重要性,以及在PACIAE模型中加入的奇异夸克抑制的还原机制。本文还分析了从CERN超级质子同步加速器(SPS)到LHC的pp碰撞中K/{pi}比值随反应能量的变化。
The parton and hadron cascade model PACIAE based on PYTHIA is utilized to systematically investigate strange particle production in pp collisions at energies available at the BNL Relativistic Heavy Ion Collider (RHIC) and the CERN Large Hadron Collider (LHC). Globally speaking, the PACIAE results of the strange particle rapidity density at midrapidity and the transverse momentum distribution are better than those of PYTHIA (default) in comparison with STAR and ALICE experimental data. This may represent the importance of the parton and hadron rescatterings, as well as the reduction mechanism of strange quark suppression, added in the PACIAE model. The K/{pi} ratios as a function of reaction energy in pp collisions from CERN Super Proton Synchrotron (SPS) to LHC energies are also analyzed in this paper.
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