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In the Higgs Triplet Model neutrino masses are generated by the vacuum expectation value of an SU(2) L scalar triplet. We consider this model and we assume that the doubly charged component of the triplet has a mass in the range of several 100 GeV, such that it is accessible at LHC. Its decay into like-sign leptons provides a clean experimental signature,… (More)

- J. Garayoa
- 2009

We consider the full Boltzmann equations for standard and soft leptogene-sis, instead of the usual integrated Boltzmann equations which assume kinetic equilibrium for all species. Decays and inverse decays may be inefficient for thermalising the heavy-(s)neutrino distribution function, leading to significant deviations from kinetic equilibrium. We analyse… (More)

- J. Garayoa, M. C. Gonzalez-Garcia
- 2008

We consider leptogenesis induced by soft supersymmetry breaking terms (" soft leptogenesis "), in the context of the inverse seesaw mechanism. In this model there are lepton number (L) conserving and L-violating soft supersymmetry-breaking B-terms involving the singlet sneutrinos which, together with the – generically small– L-violating parameter… (More)

- Sacha Davidson, Julia Garayoa, Federica Palorini, Nuria Rius
- Physical review letters
- 2007

If the baryon asymmetry of the Universe is produced by leptogenesis, CP violation is required in the lepton sector. In the seesaw extension of the standard model with three hierarchical right-handed neutrinos, we show that the baryon asymmetry is insensitive to the Pontecorvo-Maki-Nagakawa-Sakata phases: thermal leptogenesis can work for any value of the… (More)

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