We study flavour violation in a supersymmetric SO(10) implementation of the type II seesaw mechanism, which provides a predictive realization of triplet leptogenesis. The experimental upper bounds on lepton flavour violating processes have a significant impact on the leptogenesis dynamics, in particular they exclude the strong washout regime. Requiring successful leptogenesis then constrains the otherwise largely unknown overall size of flavour-violating observables, thus yielding testable predictions. In particular, the branching ratio for mu -> e gamma lies within the reach of the MEG experiment if the superpartner spectrum is accessible at the LHC, and the supersymmetric contribution to epsilon(K) can account for a significant part of the experimental value. We show that this scenario can be realized in a consistent SO(10) model achieving gauge symmetry breaking and doublet-triplet splitting in agreement with the proton decay bounds, improving on the MSSM prediction for alpha(3)(m(Z)), and reproducing the measured quark and lepton masses.

Flavour violation in supersymmetric SO(10) unification with a type II seesaw mechanism / Calibbi, L; Frigerio, M; Lavignac, S; Romanino, Andrea. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - :12(2009). [10.1088/1126-6708/2009/12/057]

Flavour violation in supersymmetric SO(10) unification with a type II seesaw mechanism

Romanino, Andrea
2009

Abstract

We study flavour violation in a supersymmetric SO(10) implementation of the type II seesaw mechanism, which provides a predictive realization of triplet leptogenesis. The experimental upper bounds on lepton flavour violating processes have a significant impact on the leptogenesis dynamics, in particular they exclude the strong washout regime. Requiring successful leptogenesis then constrains the otherwise largely unknown overall size of flavour-violating observables, thus yielding testable predictions. In particular, the branching ratio for mu -> e gamma lies within the reach of the MEG experiment if the superpartner spectrum is accessible at the LHC, and the supersymmetric contribution to epsilon(K) can account for a significant part of the experimental value. We show that this scenario can be realized in a consistent SO(10) model achieving gauge symmetry breaking and doublet-triplet splitting in agreement with the proton decay bounds, improving on the MSSM prediction for alpha(3)(m(Z)), and reproducing the measured quark and lepton masses.
JOURNAL OF HIGH ENERGY PHYSICS
12
Calibbi, L; Frigerio, M; Lavignac, S; Romanino, Andrea
File in questo prodotto:
File Dimensione Formato  
a.pdf

non disponibili

Licenza: Non specificato
2.71 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11767/14534
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 23
  • ???jsp.display-item.citation.isi??? 21
social impact