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T: Fachverband Teilchenphysik
T 51: Flavor physics: CKM I
T 51.7: Talk
Wednesday, April 1, 2020, 18:00–18:15, H-HS XI
Measurement of the weak mixing phase φs in Bs0 → Ds+ Ds− decays with the LHCb experiment — •Louis Gerken, Philipp Ibis, and Antje Mödden — Experimentelle Physik 5, TU Dortmund
The LHCb experiment performs precision measurements of CP violation to test the Standard Model of particle physics. In Bs0 → Ds+ Ds− decays, the CP-violating parameter φs can be measured. This weak mixing phase arises in the interference between the direct decay of the Bs0 meson and the decay after mixing.
In this talk, the selection of Bs0 → Ds+ Ds− candidates for a measurement of φs will be presented. A challenging part of the selection is the suppression of hadronic background decays. The analysis uses the full Run II dataset corresponding to an integrated luminosity of 6 fb−1 collected during 2015 to 2018 at a centre-of-mass energy of 13 TeV.