Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2009-12-31
Phys.Rev.D81:113007,2010
Physics
High Energy Physics
High Energy Physics - Experiment
To appear at Physical Review D. Discussions on the systematic uncertainties of the unfolded mass spectrum are added
Scientific paper
10.1103/PhysRevD.81.113007
We present a study of tau->pipipinu, tau->Kpipinu, tau->KKpinu, and tau->KKKnu decays using a 666 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at and near a center-of-mass energy of 10.58 GeV. The branching fractions are measured to be: B(tau->pipipinu) = (8.42+-0.01+0.26-0.25) x 10^-2, B(tau->Kpipinu) = (3.30+-0.01+0.16-0.17) x 10^-3, B(tau->KKpinu) = (1.55+-0.01+0.06-0.05) x 10^-3, and B(tau->KKKnu) = (3.29+-0.17+0.19-0.20) x 10^-5, where the first uncertainty is statistical and the second is systematic. These branching fractions do not include contributions from modes in which a pi^+pi^- pair originates from a Ks decay. We also present the unfolded invariant mass distributions for these decays.
for the Belle Collaboration
Lee John M.
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