13 papers
Schwinger's oscillator method, supersymmetric quantum mechanics and massless particles
F. M. Mejia, V. Pleitez
We consider the Schwinger's method of angular momentum addition using the SU(2) algebra with both a fermionic and a bosonic oscillator. We show that the total spin states obtained…
Left-right asymmetries, the weak mixing angle, and new physics
J. C. Montero, V. Pleitez, M. C. Rodriguez
The goal of this article is to outline the advantages of the measurement of left-right asymmetries in lepton-lepton () scattering for performing precision…
Realistic extremely flat scalar potential in 3-3-1 models
Alex G. Dias, V. Pleitez, M. D. Tonasse
We show that in 3-3-1 models it is possible to implement an extremely flat scalar potential, i.e., a zero contribution to the cosmological constant, and still having realistic valu…
Neutrino-neutrino and neutrino-matter helicity flip interactions
Vicente Pleitez
Taking into account that neutrinos are massive particles and that they are produced mainly as states of negative helicity, we show that the neutral and charged current interactions…
MSW effect with flavor changing interactions and the atmospheric neutrino problem
J. C. Montero, V. Pleitez
We consider flavor changing effective neutrino interactions in the context of massive neutrinos in the issue of atmospheric neutrinos. Assuming as usual that this is an indication…
In search of fundamental laws
V. Pleitez
One of the main activities in science teaching, and in particular in Physics teaching, is not only the discussion of both modern problems and problems which solution is an urgent m…