2001/06/29 by R. Baier, Yu. L. Dokshitzer, A. H. Mueller +1 · 1 citation
Physics and Astronomy · #hep-ph #nucl-th
paper · pdf · doi:10.1088/1126-6708/2001/09/033
published as JHEP 0109 (2001) 033 · 20 pp, 5 eps figures
arxiv created 2001/06/29 · arxiv updated 2009/11/30
We determine how the yield of large transverse momentum hadrons is modified due to induced gluon radiation off a hard parton traversing a QCD medium. The quenching factor is formally a collinear- and infrared-safe quantity and can be treated perturbatively. In spite of that, in the p_⊥ region of practical interest, its value turns out to be extremely sensitive to large distances and can be used to unravel the properties of dense quark-gluon final states produced in heavy ion collisions. We also find that the standard modelling of quenching by shifting p_⊥ in the hard parton cross section by the mean energy loss is inadequate.