Yield ratios of identified hadrons in p+p, p+Pb, and Pb+Pb collisions at energies available at the CERN Large Hadron Collider

Feng-lan Shao, Guo-jing Wang, Rui-qin Wang, Hai-hong Li, and Jun Song
Phys. Rev. C 95, 064911 – Published 23 June 2017

Abstract

Yield ratios of identified hadrons observed in high multiplicity p+p and p+Pb collisions at the CERN Large Hadron Collider show remarkable similarity with those in Pb+Pb collisions, indicating some important and universal underlying dynamics in hadron production for different quark gluon final states. We use the quark combination model to explain the data of yield ratios in these three collision systems. The observed p/π and Λ/Ks0 can be reproduced simultaneously by quark combination, and these two ratios reflect the probability of baryon production at hadronization which is the same in the light sector and strange sector and is roughly constant in p+p, p+Pb, and Pb+Pb collision systems over three orders of magnitude in charged particle multiplicity. The data of Ks0/π, Λ/π, Ξ/π, and Ω/π show a hierarchy behavior relating to the strangeness content and are naturally explained by quark combination both in the saturate stage at high multiplicity and in the increase stage at moderate multiplicity. Our results suggest that the characteristic of quark combination is necessary in describing the production of hadrons in small systems created in p+p and p+Pb collisions.

  • Figure
  • Figure
  • Received 21 March 2017
  • Revised 28 April 2017

DOI:https://doi.org/10.1103/PhysRevC.95.064911

©2017 American Physical Society

Physics Subject Headings (PhySH)

Particles & FieldsNuclear Physics

Authors & Affiliations

Feng-lan Shao1, Guo-jing Wang1, Rui-qin Wang1, Hai-hong Li2, and Jun Song2,*

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

  • *songjun2011@jnxy.edu.cn

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Vol. 95, Iss. 6 — June 2017

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