Investigating color screening in proton-nucleus collisions with complex potentials  

作　　者：Liuyuan Wen Xiaojian Du Shuzhe Shi Baoyi Chen 文流渊;杜晓健;施舒哲;陈保义(Department of Physics,Tianjin University,Tianjin 300350,China;Fakultat fur Physik,Universitat Bielefeld,D-33615 Bielefeld,Germany;Center for Nuclear Theory,Department of Physics and Astronomy,Stony Brook University,Stony Brook,New York,11784,USA)

机构地区：[1]Department of Physics,Tianjin University,Tianjin 300350,China [2]Fakultat fur Physik,Universitat Bielefeld,D-33615 Bielefeld,Germany [3]Center for Nuclear Theory,Department of Physics and Astronomy,Stony Brook University,Stony Brook,New York,11784,USA

出　　处：《Chinese Physics C》2022年第11期203-211,共9页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China (NSFC)(12175165, 11705125);support from U.S. Department of Energy,Office of Science,Office of Nuclear Physics,(DE-FG88ER40388);support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the CRC-TR 211’Strong-interaction matter under extreme conditions’–project number 315477589–TRR 211

摘　　要：Color screening and parton inelastic scattering modify the heavy-quark antiquark potential in mediums consisting of particles from quantum chromodynamics(QCD),leading to the suppression of quarkonium production in relativistic heavy-ion collisions.Owing to the small charm/anti-charm(cc)pair production number in proton-nucleus(pA)collisions,the correlation between different cc pairs is negligible,which makes the Schrödinger equation viable for tracking the evolution of only one cc pair.We employ the time-dependent Schrödinger equation with an in-medium cc potential to study the evolution of charmonium wave functions in a hydrodynamic-like QCD medium produced in pA collisions.We explore different parametrizations of real and imaginary parts of the cc potential and calculate the nuclear modification factors(R_(pA))of J/ψ and ψ(2S)in √s_(NN)=5.02 TeV energy p-Pb collisions at the Large Hadron Collider(LHC).Comparing strong and weak screening scenarios with experimental data in this approach,we arrive at the conclusion that color screening is weak at temperatures close to the deconfined phase transition.Moreover,the imaginary part of the potential is crucial in describing the experimental data,which is consistent with widely studied semi-classical approaches,where dissociation rates are essential.

关 键 词：heavy-ion collision quarkonium dissociation quark-gluon plasma Schrödinger equation 

分 类 号：O572.2[理学—粒子物理与原子核物理]