Lepton Flavor Violating τ Decays at Barar

Details Lepton Flavor Violating τ Decays at Barar Lepton Flavor Violating τ Decays at Barar

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006fuin.conf..210h&link_type=abstract

FUNDAMENTAL INTERACTIONS. Proceedings of the 21st Lake Louise Winter Institute. Held 17-23 February 2006 in Lake Louise, Alberta

Computer Science

Scientific paper

We report the results of three searches for lepton-flavor and lepton-number violations in the decay of the tau lepton. The analyses have been performed with around 2 × 108 e+e- → τ+τ- events collected by the BABAR detector at the PEP-II storage ring at a center-of-mass energy near 10.58 GeV. A search for the nonconservation of lepton flavor number in the decay τ± → μ± γ yielded no evidence for a signal and we set an upper limit on the branching ratio of B(τ± → μ±γ) < 6.8 × 10-8 at 90% confidence level. In the search for the non-conservation of lepton flavor in the decay τ± → e± γ we find no evidence for a signal and set an upper limit on the branching ratio of B(τ± → e±γ) < 1.1 × 10-7 at 90% confidence level. A search for lepton-flavor and lepton-number violation in the decay of the tau lepton into one charged lepton and two charged hadrons was performed in 14 different decay modes. The observed data are compatible with background expectations, and upper limits are set in the range B(τ± → ℓhh) < (0.7 - 4.8) × 10-7 at 90% confidence level. The results of these three analyses have been published in 123.

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