We study thermal leptogenesis from decays of the electroweak triplets that mediate neutrino masses in type-II and type-III see-saw. We find that Sommerfeld corrections reduce the baryon asymmetry by similar to 30%, and that successful leptogenesis needs triplets heavier than 1.6 TeV, beyond the discovery reach of LHC. (C) 2008 Elsevier B.V. All rights reserved.
Sommerfeld corrections to type-II and type-III leptogenesis
STRUMIA, ALESSANDRO
2009-01-01
Abstract
We study thermal leptogenesis from decays of the electroweak triplets that mediate neutrino masses in type-II and type-III see-saw. We find that Sommerfeld corrections reduce the baryon asymmetry by similar to 30%, and that successful leptogenesis needs triplets heavier than 1.6 TeV, beyond the discovery reach of LHC. (C) 2008 Elsevier B.V. All rights reserved.File in questo prodotto:
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