Fast heating dissociation of Υ(1S) in heavy ion collisions at RHIC  

作　　者：Yunpeng Liu Baoyi Chen 刘云朋;陈保义(Department of Applied Physics,School of Science,Tianjin University,Tianjin 300072,China)

机构地区：[1]Department of Applied Physics,School of Science,Tianjin University,Tianjin 300072,China

出　　处：《Chinese Physics C》2020年第12期158-162,共5页中国物理C（英文版）

基　　金：Supported by the NSFC (11547043, 11705125);the “Qinggu” project (1701, 40110) of Tianjin University

摘　　要：By adopting the adiabatic assumption in the cooling process,we discuss a novel mechanism ofΥ(1S)suppression that occurs due to the fast heating process at the early stage of the fireball,instead of its finite decay width in a finite temperature medium generated by heavy ion collisions.We calculate the transition probability after the fast heating dissociation as a function of the temperature of the medium and the nuclear modification factor in central collisions and find that the suppression is not negligible at RHIC,even if the width ofΥ(1S)becomes zero.

关 键 词：relativistic heavy-ion collision quark-gluon plasma heavy quarkonium adiabatic theorem 

分 类 号：O571.6[理学—粒子物理与原子核物理] O572.33[理学—物理]