Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 125: Flavour physics 6

T 125.3: Talk

Friday, March 8, 2024, 09:30–09:45, Geb. 30.41: HS 4

Search for CP violation in hadronic charm decays — •Serena Maccolini — TU Dortmund University, Dortmund, Germany

A search for the violation of the CP symmetry A_CP(h⁻h⁺) in the Cabibbo-suppressed D⁰→ h⁻ h⁺ decays with h = K, π is performed at the LHCb detector using proton-proton collisions recorded from 2015 to 2018 at the centre of mass energy of 13 TeV. The data used corresponds to an integrated luminosity of 5.7 fb⁻¹. The flavour of the charm mesons is defined from the charge of the pion in D^*+ → D⁰π⁺ and D^*− → D⁰π⁻ decays. Instrumental effects are evaluated through the calibration of high-statistics control samples (with negligible CP violation) in order to emulate the detector response for the signal candidates.
The precision of the measurements is limited by the size of the control samples after the calibration procedure. An overview on alternative techinques and future measurements is also reported.

Keywords: Flavour, LHCb, Charm, CPV, direct