Hadronic Tau Decays at Belle

2008/10/20 by K. Inami, Inami, K. · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.0810.3464

Proceedings of ICHEP08, 4 pages, 2 figures

arxiv created 2008/10/20 · arxiv updated 2009/12/01

Abstract

We present a study of hadronic tau decays, especially decay into three-hadron final states with kaon(s), using more than 500fb^-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure the branching ratios both inclusively and exclusively while considering the intermediated states of K(892)^*0. The following results are obtained: B(tau- -> K- pi+ pi- nu)=(3.25 +- 0.02 +0.16-0.15)x10^-3, B(tau- -> K- K+ pi- nu)=(1.53 +- 0.01 +- 0.06)x10^-3, B(tau- -> K- K+ K- nu)=(2.60 +- 0.23 +- 0.10)x10^-5 and B(tau- -> K^*(892)⁰ K-nu)=(1.56 +- 0.02 +- 0.09)x10^-3. We also measure the mass and width of the K^*(892)⁰ resonance as M_K^*(892)⁰ = 895.10 +- 0.27 +- 0.31 MeV/c² and Gamma_K^*(892)⁰ = 47.23 +- 0.49 +- 0.79 MeV, which are the first results obtained using tau decay.

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