5,741 research outputs found
SUSY effects on the exclusive semi-leptonic decays and
In this paper we study the polarization asymmetries of the final state lepton
in the radiative dileptonic decay of B meson (\bsllg) in the framework of
Minimal Supersymmetric Standard Model (MSSM) and various other unified models
within the framework of MSSM e.g. mSUGRA, SUGRA (where condition of
universality of scalar masses is relaxed) etc. Lepton polarization, in addition
of having a longitudinal component (\pl), can have two other components, \pt
and \pn, lying in and perpendicular to the decay plane, which are proportional
to \ml and hence are significant for final state being or
. We analyse the dependence of these polarization asymmetries
on the parameters of the various models.Comment: version accepted for publication in Phys. Rev. D. Few refrences and
two tables adde
Lepton number violation in Little Higgs model
In this note we examine the constraints imposed by muon anomalous magnetic
moment () and on lepton number violating
(LNV) couplings of the triplet Higgs in Little Higgs (LH) model.Comment: revtex4.0 file, 5 pages including 8 eps figures, version to appear in
Phys. Rev.
The effects of enhanced Z penguins on lepton polarizations in
The sensitivity of the mode to electroweak penguins and the
recent experimental data for the , modes has given rise
to what is known as the `` puzzle''. Recently it has been observed
that this {\sl puzzle} can be resolved by considering the new physics which can
enter via penguins. In this note we analyze the effect of this enhanced
penguins on the lepton polarization asymmetries of .Comment: Published versio
Neutrino Anomalies in an Extended Zee Model
We discuss an extended model which naturally leads to mass
scales and mixing angles relevant for understanding both the solar and
atmospheric neutrino anomalies. No right-handed neutrinos are introduced in the
model.The model uses a softly broken symmetry. Neutrino
masses arise only at the loop level. The one-loop neutrino masses which arise
as in the Zee model solve the atmospheric neutrino anomaly while breaking of
generates at two-loop order a mass splitting needed for
the vacuum solution of the solar neutrino problem. A somewhat different model
is possible which accommodates the large-angle MSW resolution of the solar
neutrino problem.Comment: 11 pages including 2 figures; a reference added and text changed
accordingl
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