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) RID C-5223-2009 RID C-5719-2008 RID D-1055-2009 RID A-2675-2009

LUSIANI, Alberto;
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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/2719
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 32
  • ???jsp.display-item.citation.isi??? 0
social impact