The interaction rate of an ultrarelativistic active neutrino at a temperature below the electroweak crossover plays a role in leptogenesis scenarios based on oscillations between active neutrinos and GeV-scale sterile neutrinos. By making use of a Euclideanization property of a thermal light-cone correlator, we determine the O(g)correction to such an interaction rate in the high-temperature limit πT>>mW, finding a ∼15...40%reduction. For a benchmark point, this NLO correction decreases the lepton asymmetries produced by ∼1%.
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.