Speaker
Violaine Bellee
(EPFL - Ecole Polytechnique Federale Lausanne (CH))
Description
Radiative $b$-hadron decays are a sensitive probe for new physics and a measurement of the photon polarisation in $b\rightarrow s \gamma$ transitions can help constrain several models of new physics. The methods used by the LHCb collaboration to measure the photon polarisation include the full amplitude analysis of $B \rightarrow K\pi\pi\gamma$ decays, the decay time analysis of $B_s \rightarrow \phi \gamma$ decays, and the angular analysis of $\Lambda_b \rightarrow \Lambda \gamma$ decays. The status and sensitivity of these measurements will be presented, as well as the constraints they set on the Wilson coefficients, the parameters used in the effective description of $b \rightarrow s$ transitions.
Authors
Preema Rennee Pais
(EPFL - Ecole Polytechnique Federale Lausanne (CH))
Violaine Bellee
(EPFL - Ecole Polytechnique Federale Lausanne (CH))
