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- Universidade Federal do Rio de JaneiroBR853 papers
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10 papers · 2 filters
Fermion mass hierarchy from nonuniversal abelian extensions of the Standard Model
Carlos E. Díaz, S. F Mantilla, R. Martinez
A nonuniversal abelian extension free from chiral anomalies is introduced into the Standard Model (SM), in order to evaluate its suitability in addressing the f…
B meson decay anomaly with a non-universal U(1)' extension
R. Martinez, F. Ochoa, J. M. Quimbayo
We propose an extension of the standard model with an extra U(1)' abelian symmetry, three Higgs doublets and one Higgs singlet, where the new U(1)' charges are flavour non-universa…
Radiative neutrino masses in an abelian extension of the Standard Model
S. F. Mantilla, R. Martinez, J. Muñoz
The seesaw mechanism is the preferred methodology to obtain light neutrino masses by the introduction of a Majorana mass matrix. Moreover, radiative corrections can be done in orde…
SM Higgs boson and decays in the 2HDM type III with CP violation
Ricardo Gaitán, Roberto Martinez, Jose Halim Montes de Oca +1
We compute the contributions to rare top decays and from the scalar sector in the 2HDM type III with CP violation, where is the Standard…
Lepton number violation in meson decays induced by an on-shell Majorana neutrino
Jhovanny Mejia-Guisao, Diego Milanes, Nestor Quintero +1
Lepton-number violation can be induced by the exchange of an on-shell Majorana neutrino in semileptonic decays of the meson, with $P=K,…
A gauge theory extension of the standard model
Rafael Herrera, Alexander Quintero Velez
We consider an extension of the standard model based on the group , which is naturally compatible with the standard model interacting-particle r…