Search for the Lepton Number Violating Decay Tau to Mu Gamma

Details Search for the Lepton Number Violating Decay Tau to Mu Gamma Search for the Lepton Number Violating Decay Tau to Mu Gamma

2002-12-04

arxiv.org/abs/hep-ex/0212009v1

eConf C0209101:TU12,2002; Nucl.Phys.Proc.Suppl.123:88-94,2003

Physics

High Energy Physics

High Energy Physics - Experiment

Talk at the Seventh International Workshop on Tau Lepton Physics (TAU02), Santa Cruz, Ca, USA, Sept 2002, 7 pages, LaTeX, 6 ep

Scientific paper

10.1016/S0920-5632(03)80311-0

Using data collected with the BaBar detector between 1999 and 2001, we describe a preliminary search for the neutrinoless decay Tau to Mu Gamma. This data sample includes data collected both on and off the Upsilon(4S) resonance and corresponds to 56 million produced tau pair events. The search has an efficiency of 5.2 +- 0.1(MCstat) +- 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 a preliminary upper limit of B(Tau to Mu Gamma) < 2.0 x 10^-6 @90% CL.

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