On the infrared behavior of the shear spectral function in hot Yang-Mills theory

Abstract

We revisit the determination of the two-loop spectral function in the shear channel of hot Yang-Mills theory. Correcting a technical error in an earlier computation and extending the result with a leading order Hard Thermal Loop resummation is seen to improve the infrared behavior of the quantity significantly. This makes it possible to straightforwardly use the result in the corresponding imaginary time correlator and the shear sum rule.

Comments: 25 pages, 5 figures. v2: Minor corrections in discussion and references