Charmed hadron chemistry in relativistic heavy-ion collisions

Shanshan Cao; Kai-Jia Sun; Shu-Qing Li; Shuai Y.F. Liu; Wen-Jing Xing; Guang-You Qin; Che Ming Ko

Physics Letters B (Aug 2020)

Charmed hadron chemistry in relativistic heavy-ion collisions

Shanshan Cao,
Kai-Jia Sun,
Shu-Qing Li,
Shuai Y.F. Liu,
Wen-Jing Xing,
Guang-You Qin,
Che Ming Ko

Affiliations

Shanshan Cao: Cyclotron Institute and Department of Physics and Astronomy, Texas A&M University, College Station, TX, 77843, USA; Department of Physics and Astronomy, Wayne State University, Detroit, MI, 48201, USA
Kai-Jia Sun: Cyclotron Institute and Department of Physics and Astronomy, Texas A&M University, College Station, TX, 77843, USA; Corresponding author.
Shu-Qing Li: Department of Physics and Information Engineering, Jining University, Qufu, Shandong, 273155, China; Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOE), Central China Normal University, Wuhan, Hubei, 430079, China
Shuai Y.F. Liu: Quark Matter Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu, 073000, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Cyclotron Institute and Department of Physics and Astronomy, Texas A&M University, College Station, TX, 77843, USA
Wen-Jing Xing: Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOE), Central China Normal University, Wuhan, Hubei, 430079, China
Guang-You Qin: Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOE), Central China Normal University, Wuhan, Hubei, 430079, China; Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94270, USA
Che Ming Ko: Cyclotron Institute and Department of Physics and Astronomy, Texas A&M University, College Station, TX, 77843, USA

Journal volume & issue: Vol. 807
p. 135561

Abstract

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We develop for charmed hadron production in relativistic heavy-ion collisions a comprehensive coalescence model that includes an extensive set of s and p-wave hadronic states as well as the strict energy-momentum conservation, which ensures the boost invariance of the coalescence probability and the thermal limit of the produced hadron spectrum. By combining our hadronization scheme with an advanced Langevin-hydrodynamics model that incorporates both elastic and inelastic energy loss of heavy quarks inside the dynamical quark-gluon plasma, we obtain a successful description of the pT-integrated and differential Λc/D0 and Ds/D0 ratios measured at RHIC and the LHC. We find that including the effect of radial flow of the medium is essential for describing the enhanced Λc/D0 ratio observed in relativistic heavy-ion collisions. We also find that the puzzling larger Λc/D0 ratio observed in Au+Au collisions at RHIC than in Pb+Pb collisions at the LHC is due to the interplay between the effects of the QGP radial flow and the charm quark transverse momentum spectrum at hadronization. Our study further suggests that charmed hadrons have larger sizes in medium than in vacuum.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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