Search for Baryon and Lepton Number Violating Decays of the $τ$ Lepton

Details Search for Baryon and Lepton Number Violating Decays of the $τ$ Lepton Search for Baryon and Lepton Number Violating Decays of the $τ$ Lepton

1999-02-03

arxiv.org/abs/hep-ex/9902005v1

Phys.Rev.D59:091303,1999

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, postscript file also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

10.1103/PhysRevD.59.091303

We have searched for five decay modes of the tau lepton that simultaneously violate lepton and baryon number: tau -> anti-proton gamma, tau -> anti-proton pi0, tau -> anti-proton eta, tau -> anti-proton 2pi0, and tau -> anti-proton pi0eta. The data used in the search were collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The integrated luminosity of the data sample is 4.7 fb^{-1}, corresponding to the production of 4.3 x 10^6 tau+tau- events. No evidence is found for any of the decays, resulting in much improved upper limits on the branching fractions for the two-body decays and first upper limits for the three-body decays.

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