Thermal production of relativistic Majorana neutrinos: strong enhancement by multiple soft scattering

Anisimov A, Besak D, Bödeker D (2011)
Journal of Cosmology and Astroparticle Physics 2011(03): 042.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The production rate of heavy Majorana neutrinos is relevant for models of thermal leptogenesis in the early Universe. In the high temperature limit the production can proceed via the 1 <-> 2 ( inverse) decays which are allowed by the thermal masses. We consider new production mechanisms which are obtained by including additional soft gauge interactions with the plasma. We show that an arbitrary number of such interactions gives leading order contributions, and we sum all of them. The rate turns out to be smooth in the region where the 1 <-> 2 processes are kinematically forbidden. At higher temperature it is enhanced by a factor 3 compared to the 1 <-> 2 rate.
Stichworte
leptogenesis; baryon asymmetry; physics of the early universe
Erscheinungsjahr
2011
Zeitschriftentitel
Journal of Cosmology and Astroparticle Physics
Band
2011
Ausgabe
03
Seite(n)
042
ISSN
1475-7516
eISSN
1475-7516
Page URI
https://pub.uni-bielefeld.de/record/2289552

Zitieren

Anisimov A, Besak D, Bödeker D. Thermal production of relativistic Majorana neutrinos: strong enhancement by multiple soft scattering. Journal of Cosmology and Astroparticle Physics. 2011;2011(03):042.
Anisimov, A., Besak, D., & Bödeker, D. (2011). Thermal production of relativistic Majorana neutrinos: strong enhancement by multiple soft scattering. Journal of Cosmology and Astroparticle Physics, 2011(03), 042. https://doi.org/10.1088/1475-7516/2011/03/042
Anisimov, A., Besak, D., and Bödeker, D. (2011). Thermal production of relativistic Majorana neutrinos: strong enhancement by multiple soft scattering. Journal of Cosmology and Astroparticle Physics 2011, 042.
Anisimov, A., Besak, D., & Bödeker, D., 2011. Thermal production of relativistic Majorana neutrinos: strong enhancement by multiple soft scattering. Journal of Cosmology and Astroparticle Physics, 2011(03), p 042.
A. Anisimov, D. Besak, and D. Bödeker, “Thermal production of relativistic Majorana neutrinos: strong enhancement by multiple soft scattering”, Journal of Cosmology and Astroparticle Physics, vol. 2011, 2011, pp. 042.
Anisimov, A., Besak, D., Bödeker, D.: Thermal production of relativistic Majorana neutrinos: strong enhancement by multiple soft scattering. Journal of Cosmology and Astroparticle Physics. 2011, 042 (2011).
Anisimov, Alexey, Besak, Denis, and Bödeker, Dietrich. “Thermal production of relativistic Majorana neutrinos: strong enhancement by multiple soft scattering”. Journal of Cosmology and Astroparticle Physics 2011.03 (2011): 042.

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arXiv: 1012.3784

Inspire: 881997

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