Kubo relations and radiative corrections for lepton number washout

Bodeker, D.; Laine, Mikko Sakari (2014). Kubo relations and radiative corrections for lepton number washout. Journal of cosmology and astroparticle physics, 2014(05), 041-041. Institute of Physics Publishing IOP 10.1088/1475-7516/2014/05/041

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The rates for lepton number washout in extensions of the Standard Model containing right-handed neutrinos are key ingredients in scenarios for baryogenesis through leptogenesis. We relate these rates to real-time correlation functions at finite temperature, without making use of any particle approximations. The relations are valid to quadratic order in neutrino Yukawa couplings and to all orders in Standard Model couplings. They take into account all spectator processes, and apply both in the symmetric and in the Higgs phase of the electroweak theory. We use the relations to compute washout rates at next-to-leading order in g, where g denotes a Standard Model gauge or Yukawa coupling, both in the non-relativistic and in the relativistic regime. Even in the non-relativistic regime the parametrically dominant radiative corrections are only suppressed by a single power of g. In the non-relativistic regime radiative corrections increase the washout rate by a few percent at high temperatures, but they are of order unity around the weak scale and in the relativistic regime.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Laine, Mikko Sakari

Subjects:

500 Science > 530 Physics

ISSN:

1475-7516

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

21 Nov 2014 14:38

Last Modified:

26 Jun 2016 01:55

Publisher DOI:

10.1088/1475-7516/2014/05/041

ArXiv ID:

1403.2755

BORIS DOI:

10.7892/boris.60187

URI:

https://boris.unibe.ch/id/eprint/60187

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