Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 4: Quark mixing and CP violation

T 4.5: Talk

Monday, March 15, 2021, 17:00–17:15, Td

Measurement of CP violation in B_s⁰ → D_s⁺ D_s⁻ and B⁰ → D⁺ D⁻ decays with the LHCb experiment — •Louis Gerken, Philipp Ibis, and Antje Mödden — Experimentelle Physik 5, TU Dortmund

The LHCb experiment performs measurements of CP violation to test the Standard Model of particle physics. CP-violation parameters, such as φ_s and sin(2β), can be measured in b→ ccs and b→ ccd transitions, respectively. These phases occur in the interference between the direct decay of the B_(s)⁰ meson and the decay after mixing. In the topologically similar decays B_s⁰ → D_s⁺ D_s⁻ and B⁰ → D⁺ D⁻ a time-dependent measurement of CP violation can be performed.

In this talk, the selection of B_s⁰ → D_s⁺ D_s⁻ and B⁰ → D⁺ D⁻ candidates for these CP-violation measurements will be presented. The analysis uses data collected by the LHCb detector during 2015 to 2018 at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 6 fb⁻¹.