A non-perturbative contribution to jet quenching
Institute for Theoretical Physics, Albert Einstein Center, University of Bern, Sidlerstrasse 5, 3012, Bern, Switzerland
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Revised: 25 October 2012
Published online: 20 November 2012
It has been argued by Caron-Huot that infrared contributions to the jet quenching parameter in hot QCD, denoted by , can be extracted from an analysis of a certain static-potential related observable within the dimensionally reduced effective field theory. Following this philosophy, the order of magnitude of a non-perturbative contribution to from the colour-magnetic scale, g 2 T/π, is estimated. The result is small; it is probably below the parametrically perturbative but in practice slowly convergent contributions from the colour-electric scale, whose all-orders resummation therefore remains an important challenge.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2012