Search for the Lepton-Flavor-Violating Leptonic B Decays B^0 -> μ^\pm τ^\mp and B^0 -> μ^\pm τ^\mp

Details Search for the Lepton-Flavor-Violating Leptonic B Decays B^0 -> μ^\pm τ^\mp and B^0 -> μ^\pm τ^\mp Search for the Lepton-Flavor-Violating Leptonic B Decays B^0 -> μ^\pm τ^\mp and B^0 -> μ^\pm τ^\mp

2004-08-05

arxiv.org/abs/hep-ex/0408011v1

Phys.Rev.Lett.93:241802,2004

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2004/, Submitted to PRL

Scientific paper

10.1103/PhysRevLett.93.241802

We have searched a sample of 9.6 million BBbar events for the lepton-flavor-violating leptonic B decays, B^0 -> \mu^\pm \tau^\mp and B^0 -> e^\pm \tau^\mp. The \tau-lepton was detected through the decay modes \tau -> \ell\nu\bar\nu, where \ell = e, \mu. There is no indication of a signal, and we obtain the 90% confidence level upper limits [Br(B^0 -> \mu^\pm \tau^\mp)] < 3.8 X 10^-5 and [Br(B^0 -> e^\pm \tau^\mp)] < 1.1 X 10^-4.

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