Measurement of B -> D^(*) tau nu using full reconstruction tags

2009/10/22 by I. Adachi, Adachi, I.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.0910.4301

14 pages, 5 figures, 5 tables, contributed to Lepton-Photon 09

arxiv created 2009/10/22 · arxiv updated 2009/12/01

Abstract

We present measurements of B -> D^* tau nu and B -> D tau nu decays using 604.5 fb^-1 of data collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e⁺e^- collider. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We obtain Br(B⁺ -> D⁰-bar tau⁺ nu) = (1.51 +0.41/-0.39 +0.24/-0.19 +/- 0.15)%, Br(B⁺ -> D^*0-bar tau⁺ nu) = (3.04 +0.69/-0.66 +0.40/-0.47 +/- 0.22)%, Br(B⁰ -> D^- tau⁺ nu) = (1.01 +0.46/-0.41 +0.13/-0.11 +/- 0.10)%, Br(B⁰ -> D^*- tau⁺ nu) = (2.56 +0.75/-0.66 +0.31/-0.22 +/- 0.10)%, where the first error is statistical, the second is systematic, and the third is due to the uncertainty in the branching fraction for the normalization mode.

Related

• Measurement of B- -> tau- nu_tau-bar Decay With a Semileptonic Tagging Method
• The experimental review of B -> D^(*) tau nu decays
• Measurement of the Semileptonic Decays B --> D tau nubar and B --> D* tau nubar
• Measurement of the branching fraction of B⁺ -> tau⁺ nu_tau decays with the semileptonic tagging method
• Evidence for B+ --> tau+ nu_tau decays using hadronic B tags