Study of the tau^- -> K^- pi^+ pi^- nu_tau decay

Abstract

We present a study of tau^- -> K^- pi^+ pi^- nu_tau decay using ~669 /fb data, collected with the Belle detector at the KEKB asymmetric-energy e^+ e- collider. The data is recorded at a center-of-mass energy 10.58 GeV. The result for the branching ratio is : B = (3.25 +- 0.02(stat.) +0.16 -0.15(sys.))x10^-3 >. We also present results of the precise measurement of the branching ratio of other 3-prong decay modes, tau^- -> pi^- pi^+ pi^- nu_tau, tau^- -> K^- K^+ pi^- nu_tau, and tau^- -> K^- K^+ K^- nu_tau .

17 pages, 11 figures. Contributed to ICHEP08 (Philadelphia, USA, Jul. 2008) and TAU08 (Novosibirsk, Russia, Oct. 2008)

References in corpus (5)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Study of tau- -> K_S pi- nu_tau decay at Belle
• Exclusive branching fraction measurements of semileptonic tau decays into three charged hadrons, ${\tau }^{-}\to \varphi {\pi }^{-}{\nu }_{\tau }$ and ${\tau }^{-}\to \varphi K^{-}{\nu }_{\tau }$
• Tau and muon pair production cross-sections in electron-positron annihilations at sqrt{s} = 10.58 GeV