Rare Bc->Ds l^+ l^- decay beyond the standard model

TL;DR

This paper analyzes the rare Bc->Ds l^+ l^- decay using a model-independent approach, revealing sensitivities to new physics effects in branching ratios and lepton polarizations beyond the Standard Model.

Contribution

It provides general expressions for polarization asymmetries and explores their dependence on new Wilson coefficients, offering tools for new physics searches.

Findings

Branching ratios are highly sensitive to scalar and tensor interactions.

Lepton polarization asymmetries show significant dependence on new physics parameters.

Results aid in identifying signals of physics beyond the Standard Model.

Abstract

The rare Bc->Ds l^+ l^- decay is investigated by using the most general model independent effective Hamiltonian. The general expressions of longitudinal, normal and transversal polarization asymmetries for l^- and l^+ and the combined asymmetries of them are found. The dependencies of the branching ratios and polarizations on the new Wilson coefficients are presented. The analysis shows that the branching ratios and the lepton polarization asymmetries are very sensitive to the scalar and tensor type interactions. These results will be very useful in searching new physics beyond the standard model.