320 research outputs found
Right Handed Neutrino Currents in the SU(3)_LxU(1)_N Electroweak Theory
A version of the \mbox{SU(3)}_L\otimes \mbox{U(1)}_N electroweak theory in
which there are right-handed neutrino currents is reconsidered in detail. We
argue that in order to have a result consistent with low-energy one, the
right-handed neutrino component must be treated as correction instead of an
equivalent spin state. The data from the -decay allow us to fix the limit
for as . From the neutrino neutral
current scattering, we estimate a bound for the new neutral gauge boson
mass in the range of 400 GeV. A bound for the new charged and neutral
(non-Hermitian) gauge bosons is also obtained from
symmetry-breaking hierarchy.Comment: 13 pages, latex, no figures, Presented at the 2nd Recontres du
Vietnam - Physics at the Frontiers of the Standard Model, Ho Chi Minh City,
Vietnam, 21-28 October 199
Electroweak phase transition in the economical 3-3-1 model
We consider the EWPT in the economical 3-3-1 (E331) model. Our analysis shows
that the EWPT in the model is a sequence of two first-order phase transitions,
at the TeV scale and at the
GeV scale. The EWPT is triggered by the new
bosons and the exotic quarks; its strength is about if the mass ranges
of these new particles are . The
EWPT is strengthened by only the new bosons; its
strength is about if the mass parts of , and
are in the ranges . The
contributions of and to the strengths of both EWPTs may
make them sufficiently strong to provide large deviations from thermal
equilibrium and B violation necessary for baryogenesis.Comment: 17 pages, 9 figure
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