A search for the charged-lepton-flavor-violating process Z→eμ is presented, using 139fb−1 of √s=13TeV pp collision data collected by the ATLAS experiment at the LHC. An excess in the eμ invariant mass spectrum near the Z boson mass would be a striking signature of new physics. No excess is observed, and an upper limit B(Z→eμ)<2.62×10−7 is placed on the branching fraction at 95% confidence level, which is the most stringent limit to date.

Search for the charged-lepton-flavor-violating decay Z→eμ in pp collisions at √s=13TeV with the ATLAS detector

Cristoforetti M.;Di Luca A.
2023-01-01

Abstract

A search for the charged-lepton-flavor-violating process Z→eμ is presented, using 139fb−1 of √s=13TeV pp collision data collected by the ATLAS experiment at the LHC. An excess in the eμ invariant mass spectrum near the Z boson mass would be a striking signature of new physics. No excess is observed, and an upper limit B(Z→eμ)<2.62×10−7 is placed on the branching fraction at 95% confidence level, which is the most stringent limit to date.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11582/339996
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