854 research outputs found
The Polarization and the Recombination Mechanism
We use the recombination and the Thomas Precession Model to obtain a
prediction for the polarization in the
reaction. We study the effect of the recombination function on the
polarization.Comment: 4 pages, LaTex, 1 figures included, aipproc.sty included. Talk
presented at Simposio Latino Americano de Fisica de Altas Energias, Merida,
Mexico, November 199
Study of the lepton flavor-violating decay
The lepton flavor violating decay is studied in the
context of several extended models that predict the existence of the new gauge
boson named . A calculation of the strength of the lepton flavor
violating coupling is presented by using the most general
renormalizable Lagrangian that includes lepton flavor violation. We used the
experimental value of the muon magnetic dipole moment to bound this coupling,
from which the parameter
is constrained and it is found that
for a
boson mass of 2 TeV. Alongside, we employed the experimental
restrictions over the and processes
in the context of several models that predict the existence of the
gauge boson to bound the mentioned coupling. The most restrictive bounds come
from the calculation of the three-body decay. For this case, it was found that
the most restrictive result is provided by a vector-like coupling, denoted as
, for the case, finding around for a
boson mass of 2 TeV. We used this information to estimate the
branching ratio for the decay. According to the analyzed
models the least optimistic result is provided by the Sequential model,
which is of the order of for a boson mass around 2 TeV.Comment: Revised versio
Constraints on exotic particle masses from flavor violating charged lepton decays and the role of interference
Together with any Beyond the Standard Model ultraviolet complete,
renormalizable model, one or several exotic particles are usually hypothesized.
-even neutral and doubly-charged scalars are common, well known examples
which can contribute to the seven 3-body Charged Lepton Flavor Violating
decays. The experimental bounds on each Branching Ratio within this set of
processes provide a good test for new physics that can induce powerful
constraints on relevant parameter spaces. This is specially true for a third
species of particle which, unlike the previous two, is a rare feature of
renormalizable models: a doubly charged vector bilepton. We show how these
purely leptonic bounds can indeed induce relevant exclusion regions for the
corresponding particles masses, stronger than what have been considered in the
literature for the alternative flavor conserving case, and examine how
interference effects can influence these regions in a non-trivial way
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