A self-consistent light-front quark model calculation gives B_s to P(V) form factors and decay observables, with semileptonic results consistent with lattice QCD and LHCb but nonleptonic predictions requiring fitted effective Wilson coefficients.
Prediction of various observables for $B_s^0 \to D_s^{(*)-}\ell^+\nu_\ell$ within covariant confined quark model
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abstract
In 2020, the LHCb collaboration reported the exclusive branching fractions for the channels $B_s^0 \to D_s^{(*)-}\mu^+\nu_\mu$ for the very first time. In view of these observations, we have recently reported the form factors and branching fraction computations for these channels employing the covariant confined quark model. As different other channels corresponding to $b \to c \ell \nu_\ell$ have provided the hint for New Physics, the analysis of observables such as forward-backward asymmetry, longitudinal and transverse polarizations across the lepton flavours can serve as one of the important probes for the search for possible New Physics. In present work, we compute these observables for all the lepton flavours and compare our predictions with the other theoretical approaches.
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Weak decays of $B_s$ meson in self-consistent covariant light-front approach
A self-consistent light-front quark model calculation gives B_s to P(V) form factors and decay observables, with semileptonic results consistent with lattice QCD and LHCb but nonleptonic predictions requiring fitted effective Wilson coefficients.