Leptogenesis and Low-energy Observables
نویسندگان
چکیده
منابع مشابه
Leptogenesis and Low-energy Observables
We relate leptogenesis in a class of theories to low-energy experimental observables: quark and lepton masses and mixings. With reasonable assumptions motivated by grand unification, one can show that the CP-asymmetry parameter takes a universal form. Furthermore the dilution mass is related to the light neutrino masses. Overall, these models offer a natural explanation for a lepton asymmetry i...
متن کاملLeptogenesis and low energy observables in left–right symmetric models
In the context of left–right symmetric models we study the connection of leptogenesis and low energy parameters such as neutrinoless double beta decay and leptonic CP violation. Upon imposition of a unitarity constraint, the neutrino parameters are significantly restricted and the Majorana phases are determined within a narrow range, depending on the kind of solar solution. One of the Majorana ...
متن کاملLeptogenesis and low-energy phases
In supersymmetric models, the CP asymmetry produced in the decay of the lightest right-handed neutrino, ≡ ǫ, can be written as a function of weak scale parameters. We introduce a way of separating ǫ into contributions from the various weak-scale phases, and study the contribution of potentially measurable neutrino phases to leptogenesis. We find that the Majorana phase φ′, which could have obse...
متن کاملLeptogenesis, mass hierarchies and low energy parameters
Leptogenesis in a left–right symmetric model is investigated for all possible neutrino mass hierarchies. The predictions of the model for low energy parameters as measured in neutrinoless double beta decay and in oscillation experiments are compared. The preferred values of the Majorana phases and limits on the smallest mass state are given. The main observation is that for the inverse hierarch...
متن کاملAllowable Low-Energy E6 Subgroups from Leptogenesis
There are only two viable low-energy E6 subgroups: SU(3)C ×SU(2)L ×U(1)Y × U(1)N or SU(3)C × SU(2)L × SU(2)′R × U(1)YL+Y ′ R , which would not erase any preexisting lepton asymmetry of the Universe that may have been created by the decay of heavy singlet (right-handed) neutrinos or any other mechanism. They are also the two most favored E6 subgroups from a recent analysis of present neutral-cur...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2009
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2009.02.075