Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-06-15
Phys.Rev.C77:044904,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 4 figures. Enlarged discussion. References added. Version to appear in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.77.044904
We study the collisional energy loss mechanism for particles produced off mass-shell in a finite size QCD medium. The off mass-shell effects introduced are to consider particles produced in wave packets instead of plane waves and the length scale associated to an in-medium particles' life-time. We show that these effects reduce the energy loss as compared to the case when the particles are described as freely propagating from the source. The reduction of the energy loss is stronger as this scale becomes of the order or smaller than the medium size. We discuss possible consequences of the result on the description of the energy loss process in the parton recombination scenario.
Ayala Alejandro
Magnin Javier
Montano Luis Manuel
Rojas Eduardo
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