Energy dependence of the entropy production in relativistic heavy-ion collisions

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We compile experimental data on the production yields of protons, deuterons, and pions from 1 to 200 GeV of √S NN, and interpret them in the context of the nucleon density of a hot, dense fireball and the entropy production. The d/p yield ratio decreases with beam energy, implying that the nucleon density also decreases with beam energy. However, the entropy per nucleon increases with beam energy. In particular, the rate of the entropy increase changes dramatically at √S NN ≃ 2 GeV, where nuclear stopping and sideward flow show their maxima. We conclude that disassembled nucleons are more effective for the entropy production than particle production. A big change in the energy dependence of the entropy production has not been observed between the Alternating Gradient Synchrotron (AGS) and the Relativistic Heavy Ion Collider (RHIC) energies.

Original languageEnglish
Pages (from-to)1396-1400
Number of pages5
JournalJournal of the Korean Physical Society
Volume49
Issue number4
Publication statusPublished - 2006 Oct 1

Fingerprint

ionic collisions
entropy
energy
fireballs
particle production
stopping
nucleons
deuterons
heavy ions
synchrotrons
pions
gradients
protons

Keywords

  • Entropy
  • Fragment production
  • Heavy-ion collision
  • QGP

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Energy dependence of the entropy production in relativistic heavy-ion collisions. / Hong, Byungsik.

In: Journal of the Korean Physical Society, Vol. 49, No. 4, 01.10.2006, p. 1396-1400.

Research output: Contribution to journalArticle

@article{14e08427ac774b8396501916475e968c,
title = "Energy dependence of the entropy production in relativistic heavy-ion collisions",
abstract = "We compile experimental data on the production yields of protons, deuterons, and pions from 1 to 200 GeV of √S NN, and interpret them in the context of the nucleon density of a hot, dense fireball and the entropy production. The d/p yield ratio decreases with beam energy, implying that the nucleon density also decreases with beam energy. However, the entropy per nucleon increases with beam energy. In particular, the rate of the entropy increase changes dramatically at √S NN ≃ 2 GeV, where nuclear stopping and sideward flow show their maxima. We conclude that disassembled nucleons are more effective for the entropy production than particle production. A big change in the energy dependence of the entropy production has not been observed between the Alternating Gradient Synchrotron (AGS) and the Relativistic Heavy Ion Collider (RHIC) energies.",
keywords = "Entropy, Fragment production, Heavy-ion collision, QGP",
author = "Byungsik Hong",
year = "2006",
month = "10",
day = "1",
language = "English",
volume = "49",
pages = "1396--1400",
journal = "Journal of the Korean Physical Society",
issn = "0374-4884",
publisher = "Korean Physical Society",
number = "4",

}

TY - JOUR

T1 - Energy dependence of the entropy production in relativistic heavy-ion collisions

AU - Hong, Byungsik

PY - 2006/10/1

Y1 - 2006/10/1

N2 - We compile experimental data on the production yields of protons, deuterons, and pions from 1 to 200 GeV of √S NN, and interpret them in the context of the nucleon density of a hot, dense fireball and the entropy production. The d/p yield ratio decreases with beam energy, implying that the nucleon density also decreases with beam energy. However, the entropy per nucleon increases with beam energy. In particular, the rate of the entropy increase changes dramatically at √S NN ≃ 2 GeV, where nuclear stopping and sideward flow show their maxima. We conclude that disassembled nucleons are more effective for the entropy production than particle production. A big change in the energy dependence of the entropy production has not been observed between the Alternating Gradient Synchrotron (AGS) and the Relativistic Heavy Ion Collider (RHIC) energies.

AB - We compile experimental data on the production yields of protons, deuterons, and pions from 1 to 200 GeV of √S NN, and interpret them in the context of the nucleon density of a hot, dense fireball and the entropy production. The d/p yield ratio decreases with beam energy, implying that the nucleon density also decreases with beam energy. However, the entropy per nucleon increases with beam energy. In particular, the rate of the entropy increase changes dramatically at √S NN ≃ 2 GeV, where nuclear stopping and sideward flow show their maxima. We conclude that disassembled nucleons are more effective for the entropy production than particle production. A big change in the energy dependence of the entropy production has not been observed between the Alternating Gradient Synchrotron (AGS) and the Relativistic Heavy Ion Collider (RHIC) energies.

KW - Entropy

KW - Fragment production

KW - Heavy-ion collision

KW - QGP

UR - http://www.scopus.com/inward/record.url?scp=33751029886&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33751029886&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:33751029886

VL - 49

SP - 1396

EP - 1400

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

SN - 0374-4884

IS - 4

ER -