Multiplicity distributions for jet parton showers in a medium

Details Multiplicity distributions for jet parton showers in a medium Multiplicity distributions for jet parton showers in a medium

2005-09-30

arxiv.org/abs/hep-ph/0509364v1

Nucl. Phys. A 774 (2006) 549-552

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 eps-figures. Talk given at Quark Matter 2005, Budapest, 4-9 Aug 2005

Scientific paper

10.1016/j.nuclphysa.2006.06.084

The "jet-quenching" interpretation of suppressed high-pT hadron production at RHIC implies that jet multiplicity distributions and jet-like particle correlations in heavy-ion collisions at RHIC and LHC differ strongly from those seen at e+e- or pp colliders. Here, we present an approach for describing the changes induced by the medium, which implements jet quenching as a probabilistic medium-modified parton shower, treating leading and subleading parton splittings on an equal footing. We show that the strong suppression of single inclusive hadron spectra measured in Au-Au collisions at RHIC implies a characteristic distortion of the single inclusive distribution of soft partons inside the jet. We determine, as a function of jet energy, to what extent the soft jet fragments can be measured above some momentum cut.

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