Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 6: Flavour physics I

T 6.3: Vortrag

Montag, 15. März 2021, 16:30–16:45, Tf

A feasibility study for the search of lepton flavour violating decay τ⁻→φ(K⁺K⁻)µ⁻ at LHCb — •Chishuai Wang, Flavio Archilli, Rowina Caspary, and Giulia Frau for the LHCb collaboration — Physikalisches Institut, Heidelberg, Germany

The Lepton Flavour Violating (LFV) decays are highly suppressed in the Standard Model and only possible via higher order diagrams including neutrino oscillation. However, potential new physics models can significantly enhance their branching frations. For example, leptoquark hinted by some recent test of lepton univerisality might have significant contributions to the decay τ⁻→φ(K⁺K⁻)µ⁻. In this talk, we will present a feasibility study to search LFV decay τ⁻→φ(K⁺K⁻)µ⁻ based on the data collected by LHCb experiment during the years from 2016 to 2018. In LHCb, copious τ leptons are produced in the decays of D_s^±,D^± and b-hadrons. This search is dominated by a background decay D_s⁺→φ(K⁺K⁻)µ⁺ν_µ which is highly similar with the signal in decay topology.