SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 25: Flavor II

T 25.2: Vortrag

Dienstag, 21. März 2023, 17:15–17:30, HSZ/0304

Search for the B⁰→ D⁰D⁰ decay with the LHCb experiment. — Johannes Albrecht, Sophie Hollitt, and •Jonah Blank — TU Dortmund University, Dortmund, Germany

With precise measurements of B-meson decays the LHCb experiment can test the integrity of the Standard Model. In particular B→ DD decays are interesting to examine CP violation. While decays to charged D^± mesons have already been well measured, the B⁰→ D⁰D⁰ decay channel has not yet been observed by any experiment. The branching ratio of this decay mode is a key input to the theoretical prediction of its CP-asymmetry as well as the properties of other doubly charmed decays.
In the analysis presented in this talk, data collected by the LHCb experiment at √s= 7, 8 TeV and 13 TeV, corresponding to an integrated luminosity of 9 fb⁻¹ is used to search for the B⁰→ D⁰D⁰ decay. The B⁰→ D⁰π⁺π⁻ decay channel is used as a normalisation mode to cancel systematic uncertainties. The current status of the analysis will be presented.