Speaker
Marie Bachmayer
(EPFL - Ecole Polytechnique Federale Lausanne (CH))
Description
The photon polarisation in $b \rightarrow s \gamma$ transitions is predicted to be predominantly left handed in the Standard Model. Contributions from New Physics processes could significantly enhance the right-handed component. The $B \rightarrow K \pi \pi \gamma$ decay is a $b \rightarrow s \gamma$ transition and is sensitive to the polarisation of the photon through interference between the amplitudes describing the resonances of the $K \pi \pi$ system. We present the status of an amplitude analysis to measure the photon polarisation in $B \rightarrow K \pi \pi \gamma$ decays for the first time using data collected by the LHCb experiment between 2011 and 2018.
Primary author
Marie Bachmayer
(EPFL - Ecole Polytechnique Federale Lausanne (CH))
