https://doi.org/10.1140/epjc/s10052-009-1075-2
Regular Article - Theoretical Physics
Medium-modified average multiplicity and multiplicity fluctuations in jets
Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
* e-mail: perez@lpthe.jussieu.fr
Received:
3
April
2009
Revised:
12
May
2009
Published online:
11
June
2009
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 while next-to-leading order (NLO) corrections are suppressed by , 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.
PACS: 12.38.-t – / 12.38.Bx –
© Springer-Verlag , 2009