Abstract
Strict next-to-leading order (NLO) results for the dilepton production rate from a QCD plasma at temperatures above a few hundred MeV suffer from a breakdown of the loop expansion in the regime of soft invariant masses M 2 ≪ (πT)2. In this regime an LPM resummation is needed for obtaining the correct leading-order result. We show how to construct an interpolation between the hard NLO and the leading-order LPM expression, which is theoretically consistent in both regimes and free from double counting. The final numerical results are presented in a tabulated form, suitable for insertion into hydrodynamical codes.
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Ghisoiu, I., Laine, M. Interpolation of hard and soft dilepton rates. J. High Energ. Phys. 2014, 83 (2014). https://doi.org/10.1007/JHEP10(2014)083
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DOI: https://doi.org/10.1007/JHEP10(2014)083