Analytical coalescence formula for particle production in relativistic heavy-ion collisions

Kai-Jia Sun and Lie-Wen Chen
Phys. Rev. C 95, 044905 – Published 13 April 2017

Abstract

Based on a covariant coalescence model with a blast-wave-like parametrization for the phase-space configuration of constituent particles at freeze-out, we derive an approximate analytical formula for the yields of clusters produced in relativistic heavy-ion collisions. Compared to previous formulas, the present work additionally considers the contributions from the longitudinal dimension in momentum space, the relativistic corrections, and the finite-size effects of the produced clusters relative to the spatial distribution of constituent particles at freeze-out. The new analytical coalescence formula provides a useful tool to evaluate the yield of produced clusters, such as light nuclei from nucleon coalescence and hadrons from quark coalescence, in heavy-ion collisions. As a first application of the new analytical formula, we explore the strangeness population factor S3=Λ3H/(He3×Λ/p) based on nucleon/Λ coalescence as well as the production of exotic hadrons based on quark coalescence, in central Pb+Pb collisions at sNN=2.76 TeV. The results are compared with the predictions from other models.

  • Received 10 January 2017

DOI:https://doi.org/10.1103/PhysRevC.95.044905

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Kai-Jia Sun and Lie-Wen Chen*

  • Department of Physics and Astronomy and Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai 200240, China

  • *Corresponding author: lwchen@sjtu.edu.cn

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Issue

Vol. 95, Iss. 4 — April 2017

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