Speaker
Description
The rare $b\rightarrow s\ell^+ \ell^-$ transition is a well-explored transition, particularly for new physics beyond the standard model. Similar to this transition, another flavor changing neutral current transition $b\rightarrow s\nu \bar{\nu}$ involving a dineutrino pair also plays an important role in the search for new physics. The $B \rightarrow K \nu \bar{\nu}$ mode is one such dineutrino channel that has been been analyzed in many works both within the standard model and beyond standard model framework. In this paper, we investigate the $B_c \rightarrow D_s\nu \bar{\nu}$ decay channel which proceeds via the $b\rightarrow s\nu \bar{\nu}$ transition. We consider an effective Lagrangian framework involving new physics currents. To explore these currents further, we do an analysis within some leptoquark models. In our analysis, we use the form factors that have been obtained in lattice QCD calculations. We then make predictions of some observables related to the $B_c \rightarrow D_s\nu\bar{\nu}$ mode both within the standard model and the leptoquark model.
