Speaker
Description
Decays of $B$ mesons to the $\pi\ell^{+}\ell^{-}$ final state, where $\ell$ denotes an electron or a muon, constitute a flavour-changing neutral current $b \to d$ transition that is forbidden at tree level in the standard model (SM) and proceeds through higher order loop diagrams. Such decays are sensitive to beyond-the-SM physics thanks to the possibility of new particles contributing to the loops. Because of an extra generation gap, these decays are rarer than those mediated by the $b\to s$ transition, providing an excellent complement to the lepton-flavour universality tests conducted in $b\to s$ channels. We present a preliminary study of $B\to\pi\ell^{+}\ell^{-}$ decays performed with Belle II simulation data, as well as a projection of the sensitivity of Belle II for the data sample expected in the future.
| Session | Quark and Lepton Flavour Physics |
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