Partonic coalescence in relativistic heavy ion collisions

V. Greco, C. M. Ko, P. Lévai

Research output: Contribution to journalArticle

404 Citations (Scopus)

Abstract

Using a covariant coalescence model, we study hadron production in relativistic heavy ion collisions from both soft partons in the quark-gluon plasma and hard partons in minijets. Including transverse flow of soft partons and independent fragmentation of minijet partons, the model is able to describe available experimental data on pion, kaon, and antiproton spectra. The resulting antiproton to pion ratio is seen to increase at low transverse momenta and reaches a value of about 1 at intermediate transverse momenta, as observed in experimental data at RHIC, A similar dependence of the antikaon to pion ratio on transverse momentum is obtained, but it reaches a smaller value at intermediate transverse momenta. At high transverse momenta, the model predicts that both the antiproton to pion and the antikaon to pion ratio decrease and approach those given by the perturbative QCD. Both collective flow effect and coalescence of minijet partons with partons in the quark-gluon plasma affect significantly the spectra of hadrons with intermediate transverse momenta. Elliptic flows of phi mesons and baryons such as protons, lambdas, cascades, and omegas have also been evaluated from partons with elliptic flows extracted from fitting measured pion and kaon elliptic flows. The predicted proton and lambda elliptic flows are consistent with available experimental data.

Original languageEnglish
Pages (from-to)349041-3490412
Number of pages3141372
JournalPhysical Review C - Nuclear Physics
Volume68
Issue number3
Publication statusPublished - Sep 2003

Fingerprint

ionic collisions
partons
coalescing
transverse momentum
pions
antiprotons
quarks
protons
hadrons
baryons
cascades
fragmentation
mesons
quantum chromodynamics

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Partonic coalescence in relativistic heavy ion collisions. / Greco, V.; Ko, C. M.; Lévai, P.

In: Physical Review C - Nuclear Physics, Vol. 68, No. 3, 09.2003, p. 349041-3490412.

Research output: Contribution to journalArticle

Greco, V. ; Ko, C. M. ; Lévai, P. / Partonic coalescence in relativistic heavy ion collisions. In: Physical Review C - Nuclear Physics. 2003 ; Vol. 68, No. 3. pp. 349041-3490412.
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