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)

ANDREOTTI, Mirco;AZZOLINI, Virginia;CALABRESE, Roberto;CIBINETTO, Gianluigi;LUPPI, Eleonora;NEGRINI, Matteo;SARTI, Alessio;
2005

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
Aubert, B; Barate, R; Boutigny, D; Couderc, F; Gaillard, Jm; Hicheur, A; Karyotakis, Y; Lees, Jp; Tisserand, V; Zghiche, A; Palano, A; Pompili, A; Che...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1211454
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