5,842 research outputs found
Searching for new physics in the angular distribution of B^0 -> phi K^* decay
Motivated by the possible discrepancy between the observed CP asymmetry and
that of standard model expectation in the decay mode B^0 -> phi K_S, we study
the corresponding vector vector decay mode B^0 -> phi K^*. In order to obtain
decisive information regarding the CP violating effect, we made the angular
distribution analysis of the decay products, where both the outgoing vector
mesons decay into two pseudoscalars. Furthermore, we study the possible effects
of new physics using the angular distribution observables.Comment: LaTex, 16 pages, 1 figur
Explaining B \to K pi anomaly with non-universal Z' boson
We study the effect of non-universal boson in the decay modes . In the standard model these modes receive dominant contributions from QCD penguins. Therefore, in this limit one expects , and . The corrections due to the presence of small non-penguin
contributions is found to yield and . However, the measured value of is
less than and . We show the
model with a non-universal boson can successfully explain these anomalies.Comment: 11 pages, 3 figure
Implications of lepton nonuniversality in the beauty sector
The phenomenon of CP violation in the standard model (SM) framework and the
decay dynamics have been established from the data obtained from the B
factories and so far we have not seen anything new. Nevertheless, there have
been instances of deviations in many measured observables in the flavor sector,
as far as the data and predictions are concerned. Here we will mention some
deviations obtained in measurements related to lepton universality, as seen
from the data, and try to understand their implications. To accommodate the
observed data we will consider a leptoquark model, which seems to be one
interesting model beyond the SM.Comment: 6 pages, 4 figures, talk given at BEACH 2016, George Mason
University, Fairfax, Virginia, USA, June 201
mixing and transitions in isosinglet down quark model
The recent observation of the mass difference in system seems to be not
in complete agreement with the corresponding standard model value. We consider
the model with an extra vector like down quark to explain this discrepancy and
obtain the constraints on the new physics parameters. Thereafter, we show that
with these new constraints this model can successfully explain other observed
deviations associated with transitions, namely, ,
and .Comment: 19 pages, 6 figure
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