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Medium-modified average multiplicity and multiplicity fluctuations in jets

  • Regular Article - Theoretical Physics
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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.

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  1. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany

    Redamy Perez-Ramos

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  1. Redamy Perez-Ramos
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Correspondence to Redamy Perez-Ramos.

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Perez-Ramos, R. Medium-modified average multiplicity and multiplicity fluctuations in jets. Eur. Phys. J. C 62, 541–545 (2009). https://doi.org/10.1140/epjc/s10052-009-1075-2

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  • DOI: https://doi.org/10.1140/epjc/s10052-009-1075-2

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