Medium-modified average multiplicity and multiplicity fluctuations in jets

Abstract

The energy evolution of average multiplicities and multiplicity fluctuations in jets produced in heavy-ion collisions is investigated from a toy QCD-inspired model. In this model, we use modified splitting functions accounting for medium-enhanced radiation of gluons by a fast parton which propagates through the quark gluon plasma. The leading contribution of the standard production of soft hadrons is enhanced by a factor $\sqrt{N_s}$ while next-to-leading order (NLO) corrections are suppressed by $1/\sqrt{N_s}$, where the parameter $N_s>1$ accounts for the induced-soft gluons in the medium. Our results for such global observables are cross-checked and compared with their limits in the vacuum.

8 pages and 4 figures. Version to be published in EPJC

References in corpus (6)

• Suppression of Hadrons with Large Transverse Momentum in Central Au+Au Collisions at $sqrt {s sub {sub {NN}}}_ = 130 GeV
• Centrality dependence of high pT hadron suppression in Au+Au collisions at sqrt(sNN)=130 GeV
• Suppressed pi^0 Production at Large Transverse Momentum in Central Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Perturbative QCD Approach to Multiparticle Production
• Jet hadrochemistry as a characteristics of jet quenching
• Average Multiplicities in Gluon and Quark Jets in Higher-Order Perturbative QCD

Cited by in corpus (6)

• Jet quenching
• Jet Evolution in the Quark-Gluon Plasma from RHIC to the LHC
• Medium-modified DGLAP evolution of fragmentation functions from large to small x
• Collimation of average multiplicity in QCD jets
• "Jets" and their distortion in heavy-ion collisions
• Hadron multiplicity induced by top quark decays at the LHC