Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8183204 | Nuclear Physics A | 2014 | 28 Pages |
Abstract
We study the radiative processes that affect the propagation of a high energy gluon in a dense medium, such as a quark-gluon plasma. In particular, we investigate the role of the large double logarithmic corrections, â¼Î±sln2L/Ï0, that were recently identified in the study of pâ¥-broadening by Liou, Mueller and Wu. We show that these large corrections can be reabsorbed in a renormalization of the jet quenching parameter controlling both momentum broadening and energy loss. We argue that the probabilistic description of these phenomena remains valid, in spite of the large non-locality in time of the radiative corrections. The renormalized jet-quenching parameter is enhanced compared to its standard perturbative estimate. As a particular consequence, the radiative energy loss scales with medium size L as L2+γ, with γ=2αsNc/Ï, as compared to the standard scaling in L2.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Jean-Paul Blaizot, Yacine Mehtar-Tani,