Speaker
Description
We present a model-independent study of $c \to d \mu^{+} \nu_{\mu}$ transitions to search new physics in the presence of right-handed neutrinos. We have adopted the effective field theory approach for the low-energy effective Hamiltonian comprising the dimension-six operators. The New Physics Wilson coefficients are determined through a $\chi^2$ fit by using the Miniut package to available experimental data of leptonic $D^{+} \to \bar{\mu} \nu$ and semileptonic decays $D^{0} \to \pi^{-} \bar{\mu} \nu$, $D^{+} \to \pi^{0} \bar{\mu} \nu$, $D^{0} \to \rho^{-} \bar{\mu} \nu$, $D^{+} \to \rho^0 \bar{\mu} \nu$. The differential decay width is derived to study the $B_{c}^{+} \to B_{d} \bar{\mu} \nu_{\mu}$ decay for the effect of right-handed neutrinos. We also make the predictions of $q^2$ spectra and forward-backward asymmetry ($A_{FB}$) for the mode $B_{c}^{+} \to B_{d} \bar{\mu} \nu_{\mu}$ to inspect the effect of the allowed new physics in $ c \to d$ sector through right-handed neutrinos to motivate the future measurements.
| Track type | Flavour Physics |
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