Göttingen 2025 – scientific programme

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T: Fachverband Teilchenphysik

T 52: Flavour Physics III

T 52.5: Talk

Wednesday, April 2, 2025, 17:15–17:30, VG 1.104

Measurements of mixing parameters and search for CP violation in mixing using multibody charm hadron decays at LHCb — •Florian Reiß and Marco Gersabeck — Albert-Ludwigs-Universität Freiburg, Freiburg, Germany

The large samples of charm hadrons collected by the LHCb experiment facilitates the measurement of the charm mixing parameters and the search for charge and parity symmetry violating (CPV) effects with high precision. Multi-body charm hadron decays are of particular interest, as the interference of intermediate resonances can enhance CPV effects in certain regions of the phase space of the decay.

We present studies performed with model-dependent approaches to describe the contribution of the intermediate resonances to the overall decay amplitude as a function of phase space and decay time to extract the parameters of interest. The acceleration of these analyses using Graphics Processing Units is demonstrated and the expected sensitivity of ongoing measurements is shown.

Keywords: LHCb; mixing; CPV; charm