Improved limits on lepton flavor violating tau decays to l phi, l rho, l K* and l K*bar

Abstract

We search for the neutrinoless, lepton-flavor-violating tau decays tau -> l V^0, where l is an electron or muon and V^0 is a vector meson reconstructed as phi -> K^+K^-, rho -> pi^+pi^-, K^* -> K^+pi^-, or K^*bar -> K^-pi^+. The analysis has been performed using 451 fb^{-1} of data collected at an e^+e^- center-of-mass energy near 10.58 GeV with the BaBar detector at the PEP-II storage rings. The number of events found in the data is compatible with the background expectation, and upper limits on the branching fractions are set in the range (2.6-19) x 10^{-8} at the 90% confidence level.

7 pages, 1 postscript figure, published in Physical Review Letters

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• Charged Lepton Flavour Violation in Supersymmetric Low-Scale Seesaw Models
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• Tau and muon lepton flavor violations in the littlest Higgs model with T-parity
• Snowmass 2021 White Paper: Charged lepton flavor violation in the tau sector
• Rare tau Decays in R-parity Violating Supersymmetry