Article (Scientific journals)
Implications of Flavor Dynamics for Fermion Triplet Leptogenesis
Aristizabal Sierra, Diego; Jernej Kamenik; Miha Nemevsek
2010In Journal of High Energy Physics, 2010 (10)
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Keywords :
Beyond Standard Model; Cosmology of theoreis beyond the SM; Neutrino physics
Abstract :
[en] We analyze the importance of flavor effects in models in which leptogenesis proceeds via the decay of Majorana electroweak triplets. We find that depending on the relative strengths of gauge and Yukawa reactions the B − L asymmetry can be sizably enhanced, exceeding in some cases an order of magnitude level. We also discuss the impact that such effects can have for TeV-scale triplets showing that as long as the B − L asymmetry is produced by the dynamics of the lightest such triplet they are negligible, but open the possibility for scenarios in which the asymmetry is generated above the TeV scale by heavier states, possibly surviving the TeV triplet related washouts. We investigate these cases and discuss how they can be disentangled by using Majorana triplet collider observables and, in the case of minimal type III see-saw models even through lepton flavor violation observables.
Disciplines :
Physics
Author, co-author :
Aristizabal Sierra, Diego ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique
Jernej Kamenik
Miha Nemevsek
Language :
English
Title :
Implications of Flavor Dynamics for Fermion Triplet Leptogenesis
Publication date :
October 2010
Journal title :
Journal of High Energy Physics
ISSN :
1126-6708
eISSN :
1029-8479
Publisher :
Institute of Physics Publishing (IOP)
Volume :
2010
Issue :
10
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 24 March 2011

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