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

Besak D, Bödeker D (2012)
Journal of Cosmology and Astroparticle Physics 2012(03).

Journal Article | Published | English

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The thermal production of relativistic right-handed Majorana neutrinos is ofimportance for models of thermal leptogenesis in the early Universe.Right-handed neutrinos can be produced both by 1 <-> 2 decay or inverse decayand by 2 -> 2 scattering processes. In a previous publication, we have studiedthe production via 1 <-> 2 (inverse) decay processes. There we have shown thatmultiple scattering mediated by soft gauge boson exchange also contributes tothe production rate at leading order, and gives a strong enhancement. Here wecomplete the leading order calculation by adding 2 -> 2 scattering processesinvolving either electroweak gauge bosons or third-generation quarks. We findthat processes with gauge interactions give the most important contributions.We also obtain a new sum rule for the Hard Thermal Loop resummed fermionpropagator.
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Besak D, Bödeker D. Thermal production of ultrarelativistic right-handed neutrinos: Complete leading-order results. Journal of Cosmology and Astroparticle Physics. 2012;2012(03).
Besak, D., & Bödeker, D. (2012). Thermal production of ultrarelativistic right-handed neutrinos: Complete leading-order results. Journal of Cosmology and Astroparticle Physics, 2012(03).
Besak, D., and Bödeker, D. (2012). Thermal production of ultrarelativistic right-handed neutrinos: Complete leading-order results. Journal of Cosmology and Astroparticle Physics 2012.
Besak, D., & Bödeker, D., 2012. Thermal production of ultrarelativistic right-handed neutrinos: Complete leading-order results. Journal of Cosmology and Astroparticle Physics, 2012(03).
D. Besak and D. Bödeker, “Thermal production of ultrarelativistic right-handed neutrinos: Complete leading-order results”, Journal of Cosmology and Astroparticle Physics, vol. 2012, 2012.
Besak, D., Bödeker, D.: Thermal production of ultrarelativistic right-handed neutrinos: Complete leading-order results. Journal of Cosmology and Astroparticle Physics. 2012, (2012).
Besak, Denis, and Bödeker, Dietrich. “Thermal production of ultrarelativistic right-handed neutrinos: Complete leading-order results”. Journal of Cosmology and Astroparticle Physics 2012.03 (2012).
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