Speaker
Description
Radiative b-hadron decays proceed via the flavour-changing neutral-current transitions b→sγ and b→dγ, which are forbidden at tree level in the SM and occur only through loop diagrams. As a result, they provide powerful probes of physics beyond the Standard Model. Radiative decays offer a large set of observables, including measurements of branching fractions, charge-parity violation, angular distributions and photon polarization, sensitive to different beyond the Standard Model scenarios. The form factors are challenging to calculate, with different predictions resulting from different methods. Experimental measurements shed light to the validity of the theory approaches. To study the radiative decays, LHCb uses two complementary photon reconstruction techniques: by their energy measurement in the electromagnetic calorimeter, and by their conversion into electron pairs, allowing momentum to be reconstructed with the tracking detectors. The LHCb experiment has performed a wide range of measurements setting stringent constraints on New Physics scenarios, including new and more precise measurements on b→dγ transitions.
| I read the instructions above | Yes |
|---|