Quenching of hadron spectra in media
نویسنده
چکیده
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 collinearand 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.
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