Investigating color screening in proton-nucleus collisions with complex potentials*

Wen, Liuyuan; Du, Xiaojian; Shi, Shuzhe; Chen, Baoyi

doi:10.1088/1674-1137/ac7fe6

Investigating color screening in proton-nucleus collisions with complex potentials*

Journal Article · 01 November 2022 · Chinese Physics C, High Energy Physics and Nuclear Physics

DOI:https://doi.org/10.1088/1674-1137/ac7fe6· OSTI ID:2417680

Wen, Liuyuan ^[1]; Du, Xiaojian; Shi, Shuzhe; Chen, Baoyi

OSTI

Abstract

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 () pair production number in proton-nucleus (pA) collisions, the correlation between differentpairs is negligible, which makes the Schrödinger equation viable for tracking the evolution of only onepair. We employ the time-dependent Schrödinger equation with an in-mediumpotential to study the evolution of charmonium wave functions in a hydrodynamic-like QCD medium produced inpAcollisions. We explore different parametrizations of real and imaginary parts of thepotential and calculate the nuclear modification factors () ofandinTeV energyp-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.

Research Organization:: State Univ. of New York (SUNY), Albany, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: FG02-88ER40388

OSTI ID:: 2417680

Journal Information:: Chinese Physics C, High Energy Physics and Nuclear Physics, Journal Name: Chinese Physics C, High Energy Physics and Nuclear Physics Journal Issue: 11 Vol. 46; ISSN 1674-1137

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

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