Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 51: Flavor physics: CKM I

T 51.8: Talk

Wednesday, April 1, 2020, 18:15–18:30, H-HS XI

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

The LHCb experiment aims to test the Standard Model of particle physics and searches for New Physics by performing precision measurements, e.g. decay-time-dependent measurements of CP violation in decays of neutral B mesons.

In the decay B_s⁰ → D_s⁺ D_s⁻, the weak mixing phase φ_s arises in the interference between the decay with and without B_s⁰− B_s⁰ mixing. This phase can be determined in a decay-time-dependent measurement. The analysis uses data collected by the LHCb experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 6 fb⁻¹.

In this talk, the modelling of the decay-time-dependent efficiency, the calibration of the decay-time resolution and the calibration of the Flavour Tagging is presented.