Gluon saturation and baryon stopping in the SPS, RHIC, and LHC energy regions  

作　　者：LI Shuang FENG Sheng-Qin 李双;冯笙琴(College of Science,China Three Gorges University,Yichang 443002,China;Key Laboratory of Quark and Lepton Physics(Huazhong Normal University),Ministry of Education,Wuhan 430079,China;School of Physics and Technology,Wuhan University,Wuhan 430072,China)

机构地区：[1]College of Science,China Three Gorges University,Yichang 443002,China [2]Key Laboratory of Quark and Lepton Physics(Huazhong Normal University),Ministry of Education,Wuhan 430079,China [3]School of Physics and Technology,Wuhan University,Wuhan 430072,China

出　　处：《Chinese Physics C》2012年第2期136-141,共6页中国物理C（英文版）

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)

摘　　要：A new geometrical scaling method with a gluon saturation rapidity limit is proposed to study the gluon saturation feature of the central rapidity region of relativistic nuclear collisions. The net-baryon number is essentially transported by valence quarks that probe the saturation regime in the target by multiple scattering. We take advantage of the gluon saturation model with geometric scaling of the rapidity limit to investigate net baryon distributions, nuclear stopping power and gluon saturation features in the SPS and RHIC energy regions. Predictions for net-baryon rapidity distributions, mean rapidity loss and gluon saturation feature in central Pb＋Pb collisions at the LHC are made in this paper.A new geometrical scaling method with a gluon saturation rapidity limit is proposed to study the gluon saturation feature of the central rapidity region of relativistic nuclear collisions. The net-baryon number is essentially transported by valence quarks that probe the saturation regime in the target by multiple scattering. We take advantage of the gluon saturation model with geometric scaling of the rapidity limit to investigate net baryon distributions, nuclear stopping power and gluon saturation features in the SPS and RHIC energy regions. Predictions for net-baryon rapidity distributions, mean rapidity loss and gluon saturation feature in central Pb＋Pb collisions at the LHC are made in this paper.

关 键 词：gluon saturation geometrical scaling net-baryon distributions 

分 类 号：O572.2[理学—粒子物理与原子核物理]