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T: Fachverband Teilchenphysik

T 72: Flavour Physics IV

T 72.8: Vortrag

Donnerstag, 19. März 2026, 18:00–18:15, KH 01.011

Analysis of Rare Charm Three-Body Decays using LHCb Run 3 data — Dominik Mitzel, Carolina da silva Bolognani, and •Christopher Breitfeld — TU Dortmund University, Dortmund, Germany

Flavor-changing neutral currents in the charm sector provide a sensitive testing ground for the Standard Model. Certain observables, such as CP and forward-backward asymmetries are highly suppressed and their measurements therefore constitute null tests. Dominated by non-perturbative long-distance contributions, these decays are also challenging to study theoretically. It is thus essential not only to perform null-test measurements but also to provide experimental information on the resonant structure.

Using data collected with the upgraded LHCb detector during Run 3 of the LHC, the rare decays D_(s)⁺→π⁺µ⁺µ⁻ and Λ_c⁺→ pµ⁺µ⁻ are studied. The analysis aims to measure the CP and the forward-backward asymmetry in bins of the dimuon mass, and to perform an amplitude analysis to disentangle the interference of intermediate resonances.

In this talk, an introduction and the general analysis strategy are presented.

Keywords: LHCb; Run3; Charm; Rare Decays