Explanation of Di-jet asymmetry in Pb+Pb collisions at the Large Hadron Collider

Details Explanation of Di-jet asymmetry in Pb+Pb collisions at the Large Hadron Collider Explanation of Di-jet asymmetry in Pb+Pb collisions at the Large Hadron Collider

2010-12-23

arxiv.org/abs/1012.5280v5

Phys.Rev.Lett.106:162302,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures, made corrections for numerical inaccuracies, qualitative conclusions unaffected

Scientific paper

10.1103/PhysRevLett.106.162302

We investigate the medium modification of a partonic jet shower traversing in a hot quark-gluon plasma. We derive and solve a differential equation that governs the evolution of the radiated gluon spectrum as the jet propagates through the medium. Energy contained inside the jet cone is lost by dissipation through elastic collisions with the medium and by scattering of shower partons to larger angles. We find that the jet energy loss at early times is dominated by medium effects on the vacuum radiation, and by medium-induced radiation effects at late times. We compare our numerical results for the nuclear modification of the di-jet asymmetry with that recently reported by the ATLAS collaboration.

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