TY  - JOUR
AU  - BABAR Collaboration (Lees, J. P. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
PY  - 2013
DA  - 2013//
TI  - Evidence of B+ -> tau(+)nu decays with hadronic B tags
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 031102
EP  - 9pp
VL  - 88
IS  - 3
PB  - Amer Physical Soc
AB  - We present a search for the decay B+ -> tau(+)nu using 467.8 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. We select a sample of events with one completely reconstructed B- in the hadronic decay mode (B- -> D-(*X-)0(-) and B- -> J/psi X-). We examine the rest of the event to search for a B+ -> tau(+)nu decay. We identify the tau(+) lepton in the following modes: tau(+) -> e(+)nu(nu) over bar, tau(+) -> mu(+)nu(nu) over bar, tau(+) -> pi(+)(nu) over bar and tau(+) -> rho(+)(nu) over bar. We find an excess of events with respect to the expected background, which excludes the null signal hypothesis at the level of 3.8 sigma (including systematic uncertainties) and corresponds to a branching fraction value of B(B+ -> tau(+)nu) = (1.83(-0.49)(+0.53)(stat) +/- 0.24(syst)) x 10(-4).
SN  - 1550-7998
UR  - http://arxiv.org/abs/arXiv:1207.0698
UR  - https://doi.org/10.1103/PhysRevD.88.031102
DO  - 10.1103/PhysRevD.88.031102
LA  - English
N1  - WOS:000322916300001
ID  - BABARCollaborationLees_etal2013
ER  -