Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 6: Flavour physics I
T 6.3: Talk
Monday, March 15, 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 Ds±,D± and b-hadrons. This search is dominated by a background decay Ds+→φ(K+K−)µ+νµ which is highly similar with the signal in decay topology.