Search for QCD critical point by transverse velocity dependence of anti-deuteron to deuteron ratio

作     者：喻宁 张定伟 罗晓峰 Ning Yu;Dingwei Zhang;Xiaofeng Luo

作者机构：School of Physics&Electronic EngineeringXinyang Normal UniversityXinyang 464000China Key Laboratory of Quark&Lepton Physics(MOE)and Institute of Particle PhysicsCentral China Normal UniversityWuhan 430079China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2020年第44卷第1期

页      面：53-57页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 0703[理学-化学] 0704[理学-天文学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported in part by the National Natural Science Foundation of China(11890711,11575069,11828501 and 11861131009) Fundamental Research Funds for the Central Universities(CCNU19QN054) Nanhu Scholar Program for Young Scholars of XYNU CCNU-QLPL Innovation Fund(QLPL201801) 

主　　题：QCD critical point light nuclei heavy-ion collisions QCD phase diagram quark-gluon plasma 

摘      要：We propose the transverse velocity(β_T) dependence of the anti-deuteron to deuteron ratio as a new observable to search for the QCD critical point in heavy-ion *** QCD critical point can attract the system evolution trajectory in the QCD phase diagram,which is known as the focusing *** quantify this effect,we employ the thermal and hadronic transport model to simulate the dynamical particle emission along a hypothetical focusing trajectory near the critical *** found that the focusing effect can lead to anomalous β_T dependence on ■/p,■/d and ■/~3 He *** examined the β_T dependence of ■/p and ■/d ratios of central Au+Au collisions at ■=7.7 to 200 GeV measured by the STAR experiment at ***,we only observe a negative slope in β_T dependence of ■/d ratio at ■=19.6 GeV,which indicates the trajectory evolution has passed through the critical *** the future,we could constrain the location of the critical point and/or width of the critical region by conducting precise measurements on the β_T dependence of the ■/d ratio at different energies and rapidity.