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Production of single-charm hadrons by the quark-combination mechanism in p-Pb collisions at sNN=5.02 TeV

Hai-hong Li, Feng-lan Shao, Jun Song, and Rui-qin Wang
Phys. Rev. C 97, 064915 – Published 20 June 2018

Abstract

If quark-gluon plasma (QGP)–like medium is created in p-Pb collisions at extremely high collision energies, charm quarks that move in the medium can hadronize by capturing the comoving light quark(s) or antiquark(s) to form the charm hadrons. Using light quark pT spectra extracted from the experimental data of light-flavor hadrons and a charm quark pT spectrum that is consistent with perturbative QCD calculations, the central-rapidity data of pT spectra and the spectrum ratios for D mesons in the low-pT range (pT7 GeV/c) in minimum-bias p-Pb collisions at sNN=5.02 TeV are well described by the quark combination mechanism in equal-velocity combination approximation. The Λc+/D0 ratio in quark combination mechanism exhibits the typical increase-peak-decrease behavior as the function of pT, and the shape of the ratio for pT3 GeV/c is in agreement with the data of the ALICE Collaboration in central rapidity region 0.96<y<0.04 and the preliminary data of the LHCb Collaboration in forward rapidity region 1.5<y<4.0. The global production of single-charm baryons is quantified using the data and the possible enhancement (relative to light flavor baryons) is discussed. The pT spectra of Ξc0, Ωc0 in minimum-bias events and those of single-charm hadrons in high-multiplicity event classes are predicted, which serves as the further test of the possible change of the hadronization characteristic for low-pT charm quarks in the small system created in p-Pb collisions at Large Hadron Collider energies.

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  • Received 29 December 2017
  • Revised 23 May 2018

DOI:https://doi.org/10.1103/PhysRevC.97.064915

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Hai-hong Li1,2, Feng-lan Shao1,*, Jun Song2,†, and Rui-qin Wang1

  • 1School of Physics and Engineering, Qufu Normal University, Shandong 273165, China
  • 2Department of Physics, Jining University, Shandong 273155, China

  • *shaofl@mail.sdu.edu.cn
  • songjun2011@jnxy.edu.cn

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Issue

Vol. 97, Iss. 6 — June 2018

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