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Abstract 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… Click to show full abstract
Abstract 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 π T ≫ m W , finding a ∼ 15 . . . 40 % reduction. For a benchmark point, this NLO correction decreases the lepton asymmetries produced by ∼ 1 % .
Journal Title: Nuclear Physics B
Year Published: 2020
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