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5 papers · 2 filters
SU(5)xSU(5) unification revisited
David Emmanuel-Costa, Edison T. Franco, Ricardo Gonzalez Felipe
The idea of grand unification in a minimal supersymmetric SU(5)xSU(5) framework is revisited. It is shown that the unification of gauge couplings into a unique coupling constant ca…
Determination of chi_c and chi_b polarizations from dilepton angular distributions in radiative decays
Pietro Faccioli, Carlos Lourenco, Joao Seixas +1
The angular distributions of the decay products in the successive decays chi_c (chi_b) to J/psi (Upsilon) gamma and J/psi (Upsilon) to l+l- are calculated as a function of the angu…
Low Energy Signatures of the TeV Scale See-Saw Mechanism
A. Ibarra, E. Molinaro, S. T. Petcov
We study a type I see-saw scenario where the right-handed (RH) neutrinos, responsible for the light neutrino mass generation, lie at the electroweak scale. Under certain conditions…
Model-independent constraints on the shape parameters of dilepton angular distributions
Pietro Faccioli, Carlos Lourenco, Joao Seixas +1
The coefficients determining the dilepton decay angular distribution of vector particles obey certain positivity constraints and a rotation-invariant identity. These relations are…
Leptonic mixing, family symmetries, and neutrino phenomenology
I. de Medeiros Varzielas, R. Gonzalez Felipe, H. Serodio
Tribimaximal leptonic mixing is a mass-independent mixing scheme consistent with the present solar and atmospheric neutrino data. By conveniently decomposing the effective neutrino…