Right-handed neutrino production rate at T > 160 GeV
Data(s) |
16/12/2014
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Resumo |
The production rate of right-handed neutrinos from a Standard Model plasma at a temperature above a hundred GeV has previously been evaluated up to NLO in Standard Model couplings (g ~ 2/3) in relativistic (M ~ πT) and non-relativistic regimes (M ≫ πT), and up to LO in an ultrarelativistic regime (M ≲ gT). The last result necessitates an all-orders resummation of the loop expansion, accounting for multiple soft scatterings of the nearly light-like particles participating in 1↔2 reactions. In this paper we suggest how the regimes can be interpolated into a result applicable for any right-handed neutrino mass and at all temperatures above 160GeV. The results can also be used for determining the lepton number washout rate in models containing right-handed neutrinos. Numerical results are given in a tabulated form permitting for their incorporation into leptogenesis codes. We note that due to effects from soft Higgs bosons there is a narrow intermediate regime around M ~g 1/2 T in which our interpolation is phenomenological and a more precise study would be welcome. |
Formato |
application/pdf |
Identificador |
http://boris.unibe.ch/61517/1/1475-7516_2014_12_032.pdf Ghisoiu, Ioan; Laine, Mikko Sakari (2014). Right-handed neutrino production rate at T > 160 GeV. Journal of cosmology and astroparticle physics, 2014(12), 032-032. Institute of Physics Publishing IOP 10.1088/1475-7516/2014/12/032 <http://dx.doi.org/10.1088/1475-7516/2014/12/032> doi:10.7892/boris.61517 info:doi:10.1088/1475-7516/2014/12/032 urn:issn:1475-7516 |
Idioma(s) |
eng |
Publicador |
Institute of Physics Publishing IOP |
Relação |
http://boris.unibe.ch/61517/ |
Direitos |
info:eu-repo/semantics/openAccess |
Fonte |
Ghisoiu, Ioan; Laine, Mikko Sakari (2014). Right-handed neutrino production rate at T > 160 GeV. Journal of cosmology and astroparticle physics, 2014(12), 032-032. Institute of Physics Publishing IOP 10.1088/1475-7516/2014/12/032 <http://dx.doi.org/10.1088/1475-7516/2014/12/032> |
Palavras-Chave | #530 Physics |
Tipo |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed |