A thermal neutrino interaction rate at NLO

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 $\pi T\gg m_W$, finding a $\sim 15...40\%$ reduction. For a benchmark point, this NLO correction decreases the lepton asymmetries produced by $\sim 1\%$.

24 pages

References in corpus (6)

• The Sphaleron Rate in the Minimal Standard Model
• Right-handed neutrino production rate at T > 160 GeV
• Kubo relations and radiative corrections for lepton number washout
• Sterile neutrino dark matter via GeV-scale leptogenesis?
• Order g^2 susceptibilities in the symmetric phase of the Standard Model
• CP asymmetry in heavy Majorana neutrino decays at finite temperature: the hierarchical case

Cited by in corpus (2)

• An introduction to Thermal Field Theory and Some of its Application
• Efficient numerical integration of thermal interaction rates