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Search for τ → μγ decays at BspBabar

✍ Scribed by J.M. Roney

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
574 KB
Volume
117
Category
Article
ISSN
0920-5632

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✦ Synopsis

Using data collected with the BABAR detector between 1999 and 2001, we describe a search for the neutrinoless decay τ → µγ. This data sample includes data collected both on and off the Υ (4S) resonance and corresponds to 56 × 10 6 produced tau pair events. The search has an efficiency of 5.2 ± 0.1(M Cstat) ± 0.5(sys)% and an expected background rate of 7.8 ± 1.4 events. We select 13 events in the final sample. As there is no evidence for a signal in this data, we set an upper limit of B(τ → µγ) < 2.0 × 10 -6 @90%CL.

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