We present a search for the decay B- -> tau(-)<(nu)over bar >(tau) in a sample of 88.9 x 10(6) B (B) over bar pairs recorded with the BABAR detector at the Stanford Linear Accelerator Center B factory. One of the two B mesons from the Upsilon(4S) is reconstructed in a hadronic or a semileptonic final state, and the decay products of the other B in the event are analyzed for consistency with a B- -> tau(-)<(nu)over bar >(tau) decay. We find no evidence of a signal and set an upper limit on the branching fraction of B((B) over bar -> tau(-)<(nu)over bar >(tau)) < 4.2 x 10(-4) at the 90% confidence level.

Search for the rare leptonic decay B-->tau(-)nu(tau)

BIANCHI, Fabrizio;GAMBA, Diego;
2005-01-01

Abstract

We present a search for the decay B- -> tau(-)<(nu)over bar >(tau) in a sample of 88.9 x 10(6) B (B) over bar pairs recorded with the BABAR detector at the Stanford Linear Accelerator Center B factory. One of the two B mesons from the Upsilon(4S) is reconstructed in a hadronic or a semileptonic final state, and the decay products of the other B in the event are analyzed for consistency with a B- -> tau(-)<(nu)over bar >(tau) decay. We find no evidence of a signal and set an upper limit on the branching fraction of B((B) over bar -> tau(-)<(nu)over bar >(tau)) < 4.2 x 10(-4) at the 90% confidence level.
2005
95
041804
-
B. Aubert; R. Barate; D. Boutigny; F. Couderc; J. M. Gaillard; A. Hicheur; Y. Karyotakis; J. P. Lees; V. Tisserand; A. Zghiche; A. Palano; A. Pompili;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/49931
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