Og plasma effects in jet quenching - High Energy Physics - PhenomenologyReport as inadecuate

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Abstract: We consider the bremsstrahlung energy loss of high energy partons moving inthe quark-gluon plasma, at weak coupling. We show that the rates for theseprocesses receive large Og corrections from classical nonabelian plasmaphysics effects, which are calculated. In the high-energy deep LPM regimethese corrections can be absorbed in a change of the transverse momentumbroadening coefficient $\hat{q}$, which we give to the next-to-leading order.The correction is large even at relatively weak couplings $\alpha s\sim 0.1$,as is typically found for such effects, signaling difficulties with theperturbative expansion. Our approach is based on an effective-Euclideanization- property of classical physics near the light-cone, whichallows an effective theory approach based on dimensional reduction and suggestsa new possibility for the nonperturbative lattice study of these effects.

Author: Simon Caron-Huot

Source: https://arxiv.org/

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