Thermal production of ultrarelativistic right-handed neutrinos: complete leading-order results

By D. Besak, D. Bodeker. 2012

133 citations recorded by the source corpus.

The thermal production of relativistic right-handed Majorana neutrinos is of importance for models of thermal leptogenesis in the early Universe. Right-handed neutrinos can be produced both by 1↔2 decay or inverse decay and by 2 → 2 scattering processes. In a previous publication we have studied the production via 1↔2 (inverse) decay processes. There we have shown that multiple scattering mediated by soft gauge boson exchange also contributes to the production rate at leading order and gives a strong enhancement. Here we complete the leading order calculation by adding 2 → 2 scattering processes involving either electroweak gauge bosons or third-generation quarks. We find that processes with gauge interactions give the most important contributions. We also obtain a new sum rule for the Hard Thermal Loop resummed fermion propagator.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2dbc02ff7450f46568299b19583dfd0ad791dcee

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Citations in the corpus

The Phenomenology of Right Handed Neutrinos (2013, unknown): “It requires knowledge of the quasiparticle spectrum in the plasma [223, 412, 456, 476– 479] and inclusion of all processes in the plasma [223, 224, 471, 473].”
Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos (2012, background): “Systematic approaches to include these effects can be found in [130, 131] for T > M (relevant for baryogenesis) and [132–134] for M > T (relevant for late time asymmetries).”