Baryon asymmetry of the Universe; Leptogenesis; Right-handed neutrinos
Abstract :
[en] We study a model for leptogenesis in which the total CP asymmetries in the decays and scatterings involving the SU(2) singlet seesaw neutrinos Nα vanish (ϵNα=0). Leptogenesis is possible due to nonvanishing CP violating lepton flavor asymmetries, realizing a situation in which the baryon asymmetry is due exclusively to flavor effects. We study the production of a net lepton asymmetry by solving the Boltzmann equations specific to this model, and we show that successful leptogenesis can be obtained at a scale as low as the TeV. We also discuss constraints on the model parameter space arising from current experimental upper limits on lepton flavor violating decays.
Disciplines :
Physics
Author, co-author :
Aristizabal Sierra, Diego ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules
Munoz, Luis Alfredo
Enrico, Nardi
Language :
English
Title :
Purely Flavored Leptogenesis
Publication date :
July 2009
Journal title :
Physical Review. D, Particles, Fields, Gravitation, and Cosmology
ISSN :
1550-7998
eISSN :
1550-2368
Publisher :
American Physical Society, College Park, United States - Maryland
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