Evidence for B- â τ- ν(τ) with a hadronic tagging method using the full data sample of Belle.
Phys Rev Lett
; 110(13): 131801, 2013 Mar 29.
Article
em En
| MEDLINE
| ID: mdl-23581309
ABSTRACT
We measure the branching fraction of B- â τ- ν(τ) using the full Υ(4S) data sample containing 772×10(6) BB pairs collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. Events with BB pairs are tagged by reconstructing one of the B mesons decaying into hadronic final states, and B- â τ- ν(τ) candidates are detected in the recoil. We find evidence for B- â τ- ν(τ) with a significance of 3.0 standard deviations including systematic errors and measure a branching fraction B(B- â τ- ν(τ))=[0.72(-0.25)(+0.27)(stat)±0.11(syst)]×10(-4).
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Base de dados:
MEDLINE
Assunto principal:
Teoria Quântica
/
Partículas Elementares
/
Física Nuclear
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article