Type-II seesaw mass models and baryon asymmetry
نویسندگان
چکیده
منابع مشابه
Neutrino Mass and Baryon Asymmetry from Dirac Seesaw
We extend the visible content of the standard model (SM) with a hidden sector composed of three right-handed singlet neutrinos and one singlet Higgs. These extra singlets are charged under a new U(1)X gauge symmetry while the SM particles are not. Two heavy scalar doublets are introduced to play the role of the messengers between the visible and hidden sectors. The neutrinos naturally acquire t...
متن کاملSeesaw Mechanism and the Baryon Asymmetry
Non-zero neutrino masses and mixing angles provide at the moment the only convincing evidence 1 of physics beyond the standard model. A paradigm to understand the smallness of neutrino masses, involving some new heavy states which break lepton number, is called the seesaw mechanism 2. If the heavy particles couple to the Standard Model lepton and Higgs doublets, decoupling of them generates at ...
متن کاملHiggs Mass Bounds, Type II SeeSaw and LHC
In type II seesaw utilized to explain the observed neutrino masses and mixings, one extends the Standard Model (SM) by introducing scalar fields which transform as a triplet under the electroweak gauge symmetry. New scalar couplings involving the Higgs doublet then appear and, as we show, these have important implications for the Higgs boson mass bounds obtained using vacuum stability and pertu...
متن کاملInterplay of type I and type II seesaw contributions to neutrino mass
Type I and type II seesaw contributions to the mass matrix of light neutrinos are inherently related if left-right symmetry is realized at high energy scales. We investigate implications of such a relation for the interpretation of neutrino data. We proved recently that the left-right symmetric seesaw equation has eight solutions, related by a duality property, for the mass matrix of right-hand...
متن کاملUniversal Neutrino Mass Hierarchy and Cosmological Baryon Number Asymmetry
We conjecture that three light Majorana neutrinos and their right-handed counterparts may have a universal geometric mass hierarchy. Incorporating this phenomenological conjecture with the Fritzsch texture of lepton mass matrices in a simple seesaw mechanism, we show that it is possible to simultaneously account for current neutrino oscillation data and the cosmological baryon number asymmetry ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2007
ISSN: 0550-3213
DOI: 10.1016/j.nuclphysb.2006.12.002