Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-10-20
Phys.Rev.C83:024908,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 4 figures
Scientific paper
10.1103/PhysRevC.83.024908
Studying the pathlength dependence of high P_T hadron suppression in heavy-ion collisions by measuring the dependence of hard hadron production on the angle phi with the reaction plane in non-central collisions has so far been one of the most successful tools in constraining the microscopical picture of leading parton energy loss. With the imminent start of the LHC heavy-ion program and the possibility of full jet reconstruction, the focus has shifted to models which are capable of simulating full in-medium parton showers rather than tracing the leading parton only. Yet, on the level of single inclusive hadron observables, such shower models need to reproduce the findings of leading parton energy loss models, in particular they need to reproduce the correct reaction plane angle dependence of hadron suppression. The aim of this work is to illustrate at the example of the in-medium shower code YaJEM (Yet another Jet Energy-loss Model) how pathlength dependence arises in a MC shower formulation, how it relates to pathlength dependence of leading parton energy loss and how model results compare with data on the reaction plane dependence of the nuclear suppression factor R_AA(phi).
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