Charged-lepton flavor-violating processes are unobservable in the standard model, but they are predicted to be enhanced in several extensions to the standard model, including supersymmetry and models with leptoquarks or compositeness. We present a search for such processes in a sample of 99×106Υ(2S) decays and 117×106Υ(3S) decays collected with the BABAR detector. We place upper limits on the branching fractions B(Υ(nS)→e±τ-) and B(Υ(nS)→μ±τ-) (n=2,3) at the 10-6 level and use these results to place lower limits of order 1 TeV on the mass scale of charged-lepton flavor-violating effective operators.

Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Tico, J., Grauges, E., et al. (2010). Search for charged lepton flavor violation in narrow Υ decays. PHYSICAL REVIEW LETTERS, 104(15) [10.1103/PhysRevLett.104.151802].

Search for charged lepton flavor violation in narrow Υ decays

Martinelli M;CARPINELLI, Massimo;
2010

Abstract

Charged-lepton flavor-violating processes are unobservable in the standard model, but they are predicted to be enhanced in several extensions to the standard model, including supersymmetry and models with leptoquarks or compositeness. We present a search for such processes in a sample of 99×106Υ(2S) decays and 117×106Υ(3S) decays collected with the BABAR detector. We place upper limits on the branching fractions B(Υ(nS)→e±τ-) and B(Υ(nS)→μ±τ-) (n=2,3) at the 10-6 level and use these results to place lower limits of order 1 TeV on the mass scale of charged-lepton flavor-violating effective operators.
Articolo in rivista - Articolo scientifico
BABAR detector
English
J. P. Lees et al. (BABAR Collaboration)
Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Tico, J., Grauges, E., et al. (2010). Search for charged lepton flavor violation in narrow Υ decays. PHYSICAL REVIEW LETTERS, 104(15) [10.1103/PhysRevLett.104.151802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389309
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