Thermal charm production by massive gluons and quarks

Péter Lévai, Ramona Vogt

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We investigate charm production in an equilibrated quark-gluon plasma produced in heavy-ion collisions at RHIC and LHC. Effective quark and gluon masses are introduced from thermal QCD calculations. Assuming a Bjorken-type longitudinal expansion and including the influence of temperature-dependent masses on the expansion, we determine the total number of [Formula Presented] pairs produced in the quark-gluon plasma phase. We calculate the charm production rate at leading order with massive gluons and quarks and compare our result to charm production by massless partons. We consider two different scenarios for the initial conditions, a parton gas with a rather long kinetic equilibration time and a minijet gas with a short equilibration time. In a parton gas, assuming [Formula Presented] GeV, we obtain a substantial enhancement over the thermal charm rate from massless quarks and gluons, up to 4.9 secondary charm quark pairs in Au+Au collisions at RHIC and 245 charm pairs in Pb+Pb collisions at the LHC.

Original languageEnglish
Pages (from-to)2707-2717
Number of pages11
JournalPhysical Review C - Nuclear Physics
Volume56
Issue number5
DOIs
Publication statusPublished - Jan 1 1997

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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