Search for Lepton Flavor Violation in
Journal Article
·
· Physical Review Letters
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 Υ(3S) → e±μ∓ in a sample of 118 million Υ(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 $$\mathscr{B}$$[Υ(3S) → e±μ∓ ] < 3.6 x 10-7 at 90% C. L. This result can be interpreted as a limit ΛNP/g$$^2_{NP}$$ > 80 TeV on the energy scale ΛNP divided by the coupling-squared g$$^2_{NP}$$ of relevant new physics (NP).
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- BABAR Collaboration; BARBAR Collaboration
- Grant/Contract Number:
- AC02-76SF00515; AC02-05CH11231
- OSTI ID:
- 1847196
- Alternate ID(s):
- OSTI ID: 1866834; OSTI ID: 1959788
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Vol. 128 Journal Issue: 9; ISSN 0031-9007
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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