https://doi.org/10.1140/epjc/s10052-012-2233-5
Letter
A non-perturbative contribution to jet quenching
Institute for Theoretical Physics, Albert Einstein Center, University of Bern, Sidlerstrasse 5, 3012, Bern, Switzerland
* e-mail: laine@itp.unibe.ch
Received:
31
August
2012
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
