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

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

2009-04-02

arxiv.org/abs/0904.0339v3

Phys.Rev.Lett.103:021801,2009

Physics

High Energy Physics

High Energy Physics - Experiment

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

Scientific paper

10.1103/PhysRevLett.103.021801

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.

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