Transverse momentum spectra in high-energy nucleus-nucleus, proton-nucleus and proton-proton collisions  

作　　者：谢文杰 

机构地区：[1]Department of Physics, Yuncheng University

出　　处：《Chinese Physics C》2011年第12期1111-1119,共9页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(10975095);Natural Science Foundation of Shanxi Province(2007011005)

摘　　要：The transverse momentum distributions of final-state particles produced in nucleus-nucleus （AA）, proton-nucleus （pA）, and proton-proton （pp） collisions at high energies are investigated using a multisource ideal gas model. Our calculated results show that the contribution of hard emission can be neglected in the study of transverse momentum spectra of charged pions and kaons produced in Cu-Cu collisions at √SNN=22.5 GeV. And if we consider the contribution of hard emission, the transverse momentum spectra of p and ^-p produced in Cu-Cu collisions at √SNN=22.5 GeV, K^0 produced in Pb-Pb collisions at 158 A GeV, J/φ particles produced in p-Pb collisions at 400 GeV and π^＋, K^＋, p produced in proton-proton collisions at √s=200 GeV, can be described by the model, especially in the tail part of spectra.The transverse momentum distributions of final-state particles produced in nucleus-nucleus （AA）, proton-nucleus （pA）, and proton-proton （pp） collisions at high energies are investigated using a multisource ideal gas model. Our calculated results show that the contribution of hard emission can be neglected in the study of transverse momentum spectra of charged pions and kaons produced in Cu-Cu collisions at √SNN=22.5 GeV. And if we consider the contribution of hard emission, the transverse momentum spectra of p and ^-p produced in Cu-Cu collisions at √SNN=22.5 GeV, K^0 produced in Pb-Pb collisions at 158 A GeV, J/φ particles produced in p-Pb collisions at 400 GeV and π^＋, K^＋, p produced in proton-proton collisions at √s=200 GeV, can be described by the model, especially in the tail part of spectra.

关 键 词：transverse momentum spectra multisource ideal gas model final-state particles Cu-Cu Pb-Pbp-Pb p-p collisions 

分 类 号：O572.2[理学—粒子物理与原子核物理] TU449[理学—物理]