# CP violation in charmless two-body B decays at LHCb

- Institution: CERN
- Department: LHC Seminar
- Speaker: Stefano Perazzini
- Year: 2013
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3009680)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

The study of CP violation in charmless charged two-body decays of neutral B mesons provides a test of the Cabibbo-Kobayashi-Maskawa picture of the Standard Model, and is a sensitive probe to contributions of processes beyond it. Using a data sample of proton-proton collisions, corresponding to an integrated luminosity of 1.0 fb-1, collected with the LHCb detector at a centre-of-mass energy of 7 TeV, CP violation has been observed for the first time in the B0_s to K-pi+ decay with a significance of more than 5 sigma. Furthermore, first measurements of direct and mixing-induced CP-violating asymmetries in the B0_s to K+K- decay have been performed, opening new avenues to the determination of the unitarity triangle angle gamma using decays affected by penguin processes..

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## Lectures

1. [CP violation in charmless two-body B decays at LHCb](https://invisiblenetwork.ai/learn/cern/3009680/a380334e6bd2), 50 min (CERN's player)