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- Universidade Federal do Rio de JaneiroBR853 papers
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5 papers · 2 filters
Systematic study of the SU(3)_c X SU(4)_L X U(1)_X gauge symmetry
William A. Ponce, Luis A. Sanchez
We carry a systematic study of possible extensions of the standard model based on the gauge group SU(3)_c X SU(4)_L X U(1)_X. We consider both models with particles with exotic ele…
The Landau Pole and decays in the 331 bilepton model
R. Martinez, F. Ochoa
We calculate the decay widths and branching ratios of the extra neutral boson predicted by the 331 bilepton model in the framework of two different particle contents.…
Different kind of textures of Yukawa coupling matrices in the two Higgs doublet model type III
A. Carcamo, R. Martinez, J. -Alexis Rodriguez
The quark mass matrices ansatze proposed by Fritzsch, Du-Xing and Fukuyama-Nishiura in the framework of the general two Higgs doublet model are studied. The corresponding Yukawa ma…
FCNC Top Quark Decays in Extra Dimensions
G. A. Gonzalez-Sprinberg, R. Martinez, J. -Alexis Rodriguez
The flavor changing neutral top quark decay t -> c X is computed, where X is a neutral standard model particle, in a extended model with a single extra dimension. The cases for the…
New Physics effects in the flavor-changing neutral couplings of the Top quark
F. Larios, R. Martinez, M. A. Perez
We survey the flavor-changing neutral couplings (FCNC) of the top quark predicted by some extensions of the Standard Model: THDM, SUSY, L-R symmetric, TC2, 331, and models with ext…