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 is seen to improve the infrared behavior of the quantity significantly, while a partial Hard Thermal Loop resummation is seen to have only a very minor numerical effect on the result. These facts make it possible to straightforwardly apply the spectral function to the corresponding imaginary time correlator and the shear sum rule.
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Vuorinen, A., Zhu, Y. On the infrared behavior of the shear spectral function in hot Yang-Mills theory. J. High Energ. Phys. 2015, 138 (2015). https://doi.org/10.1007/JHEP03(2015)138
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DOI: https://doi.org/10.1007/JHEP03(2015)138