A search for the charged-lepton-flavor-violating process Z→eμ is presented, using 139 fb−1 of sqrt(s) = 13 TeV 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 sqrt(s) = 13 TeV with the ATLAS detector
M Centonze;G Chiodini;E Gorini;S Grancagnolo;FG Gravili;M Greco;A Palazzo;M Primavera;S Spagnolo;A Ventura;
2023-01-01
Abstract
A search for the charged-lepton-flavor-violating process Z→eμ is presented, using 139 fb−1 of sqrt(s) = 13 TeV 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.File in questo prodotto:
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