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Article
Report number	hep-ph/0509364 ; CERN-PH-TH-2005-182 ; CERN-PH-TH-2005-182
Title	Multiplicity distributions for jet parton showers in a medium
Author(s)	Borghini, Nicolas (CERN) ; Wiedemann, Urs Achim (CERN ; Bielefeld U.)
Affiliation	(CERN)
Publication	2006
Imprint	30 Sep 2005
Number of pages	5
In:	Nucl. Phys. A 774 (2006) 549-552
In:	18th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Budapest, Hungary, 4 - 9 Aug 2005, pp.549-552
DOI	10.1016/j.nuclphysa.2006.06.084
Subject category	Particle Physics - Phenomenology
Abstract	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.
Copyright/License	Elsevier B.V.

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