O(g) plasma effects in jet quenching
- Physics Department, McGill University, 3600 rue University, Montreal, QC H3A 2T8 (Canada)
We consider the bremsstrahlung energy loss of high-energy partons moving in the quark-gluon plasma, at weak coupling. We show that the rates for these processes receive large O(g) corrections from classical (non-Abelian) plasma physics effects, which are calculated. In the high-energy (deep Landau-Pomeranchuk-Migdal) regime these corrections can be absorbed in a change of the transverse momentum broadening coefficient q-circumflex, which we give to the next-to-leading order. The correction is large even at relatively weak couplings {alpha}{sub s}{approx}0.1, as is typically found for such effects, signaling difficulties with the perturbative expansion. Our approach is based on an effective Euclideanization property of classical physics near the light cone, which allows an effective theory approach in Euclidean space and suggests new possibilities for the nonperturbative lattice study of these effects.
- OSTI ID:
- 21260198
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 79, Issue 6; Other Information: DOI: 10.1103/PhysRevD.79.065039; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Parton showers as sources of energy-momentum deposition in the QGP and their implication for shockwave formation at RHIC and at the LHC
In-medium loop corrections and longitudinally polarized gauge bosons in high-energy showers