We report on the first search for electron-muon lepton flavor violation (LFV) in the decay of a b quark and b antiquark bound state. We look for the LFV decay ?(3S)?e±µ± in a sample of 118 million ?(3S) mesons from 27 fb-1 of data collected with the BABAR detector at the SLAC PEP-II e+e- collider operating with a 10.36 GeV center-of-mass energy. No evidence for a signal is found, and we set a limit on the branching fraction B[?(3S)?e±µ±]<3.6×10-7 at 90% C. L. This result can be interpreted as a limit ?NP/gNP2>80 TeV on the energy scale ?NP divided by the coupling-squared gNP2 of relevant new physics (NP).

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2022). Search for Lepton Flavor Violation in ? (3S) ?e ±µ±. PHYSICAL REVIEW LETTERS, 128(9) [10.1103/PhysRevLett.128.091804].

Search for Lepton Flavor Violation in ? (3S) ?e ±µ±

Carpinelli M.;
2022

Abstract

We report on the first search for electron-muon lepton flavor violation (LFV) in the decay of a b quark and b antiquark bound state. We look for the LFV decay ?(3S)?e±µ± in a sample of 118 million ?(3S) mesons from 27 fb-1 of data collected with the BABAR detector at the SLAC PEP-II e+e- collider operating with a 10.36 GeV center-of-mass energy. No evidence for a signal is found, and we set a limit on the branching fraction B[?(3S)?e±µ±]<3.6×10-7 at 90% C. L. This result can be interpreted as a limit ?NP/gNP2>80 TeV on the energy scale ?NP divided by the coupling-squared gNP2 of relevant new physics (NP).
Articolo in rivista - Articolo scientifico
Elementary particles; Tellurium compounds
English
27-gen-2022
2022
128
9
091804
none
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2022). Search for Lepton Flavor Violation in ? (3S) ?e ±µ±. PHYSICAL REVIEW LETTERS, 128(9) [10.1103/PhysRevLett.128.091804].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/471598
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