Speaker
Description
I discuss exclusive $B_c$ decays. FIrst I consider the case of semileptonic modes $B_c^+\to B_a\bar{l}\nu_l$ and $B_c^+\to B^*_a(\to B_a\gamma)\bar{l}\nu_l$, with $a=s,d$ and $l = e,\mu$ in the Standard Model (SM) and in its extension based on the low-energy Hamiltonian comprising the full set of dimension-6 semileptonic $c\to s,d$ operators with left-handed neutrinos. Heavy quark spin symmetry has been used to relate the relevant hadronic matrix elements and to exploit lattice QCD results on $B_c$ form factors. Optimised observables are selected, and the pattern of their correlations is studied to identify the effects of the various operators in the extended low-energy Hamiltonian.
Furthermore, I present the analysis for $B_c^+\to B^{(*)+}\nu\bar{\nu}$ decays, for which branching fractions of at most $\mathcal{O}(10^{-16})$ are predicted in the SM. New physics effects are discussed also in this case.
Perspectives on inclusive semileptonic $\Lambda_b^0$ decays will be briefly discussed.
| In-person participation | Yes |
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