Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 60: Top Quarks: Decay and CP Violation and Mixing Angles

T 60.8: Vortrag

Mittwoch, 23. März 2022, 18:00–18:15, T-H19

Measurement of the CKM mixing angle γ with B_s⁰ → D_s^∓K^± decays at the LHCb experiment — •Quentin Führing and Kevin Heinicke — Experimentelle Physik 5, TU Dortmund

In the Standard Model of particle physics the quark mixing matrix is expected to be unitary. To test this unitarity, the properties of the unitarity triangles are constrained. The mixing angle γ is such a property of interest.

To constrain the mixing angle γ, precise decay-time-dependent measurements of CP violation in B_s⁰ → D_s^∓K^± decays can be used. With an excellent decay-time resolution and a large number of B_s⁰ decays, the LHCb experiment provides the necessary data for this measurement.

In this talk a decay-time-dependent analysis aiming to measure γ is presented. Data corresponding to an integrated luminosity of 6 fb⁻¹ recorded by the LHCb experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used for this analysis.