August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【317】Amplitude analysis of B -> K pi pi gamma decays at LHCb

Aug 31, 2021, 6:15 PM
Room B

Room B

Talk Nuclear, Particle- and Astrophysics (FAKT - TASK) Nuclear, Particle- & Astrophysics


Marie Bachmayer (EPFL - Ecole Polytechnique Federale Lausanne (CH))


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))

Presentation materials