title: Evidence for B- → τ- ν(τ) with a hadronic tagging method using the full data sample of Belle.
abstract: We measure the branching fraction of B- → 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- → τ- ν(τ) candidates are detected in the recoil. We find evidence for B- → τ- ν(τ) with a significance of 3.0 standard deviations including systematic errors and measure a branching fraction B(B- → τ- ν(τ))=[0.72(-0.25)(+0.27)(stat)±0.11(syst)]×10(-4).
authors.affiliation: High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
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mesh_terms: D004601:Elementary Particles; D009686:Nuclear Physics / Q000379:methods*; D011789:Quantum Theory