Quark charge balance function and hadronization effects in relativistic heavy ion collisions

Abstract

We calculate the charge balance function of the bulk quark system before hadronization and those for the directly produced and the final hadron system in high energy heavy ion collisions. We use the covariance coefficient to describe the strength of the correlation between the momentum of the quark and that of the anti-quark if they are produced in a pair and fix the parameter by comparing the results for hadrons with the available data. We study the hadronization effects and decay contributions by comparing the results for hadrons with those for the bulk quark system. Our results show that while hadronization via quark combination mechanism slightly increases the width of the charge balance functions, it preserves the main features of these functions such as the longitudinal boost invariance and scaling properties in rapidity space. The influence from resonance decays on the width of the balance function is more significant but it does not destroy its boost invariance and scaling properties in rapidity space either. The balance functions in azimuthal direction are also presented.

9 figures

References in corpus (4)

• Charge conservation in RHIC and contributiuons to local parity violation observables
• General Charge Balance Functions, A Tool for Studying the Chemical Evolution of the Quark-Gluon Plasma
• The influence of net-quarks on the yields and rapidity spectra of identified hadrons
• The Narrowing of Charge Balance Function and Hadronization Time in Relativistic Heavy Ion Collisions

Cited by in corpus (5)

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• Hadronization effects on the baryon-strangeness correlation in quark combination models
• Multiplicity fluctuation and correlation of mesons and baryons in ultra-relativistic heavy-ion collisions at LHC
• Balance functions of charged hadron pairs $(\pi ,K,p)\otimes (\pi ,K,p)$ in Pb--Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$2.76 TeV