We present measurements of the branching fractions of three-prong and five-prong τ decay modes using a sample of 430 million τ lepton pairs, corresponding to an integrated luminosity of 468fb-1, collected with the BABAR detector at the PEP-II asymmetric-energy e+e- storage rings at SLAC National Accelerator Laboratory. The τ-→(3π)-ηντ, τ-→(3π)-ωντ, and τ-→π-f1(1285)ντ branching fractions are presented, as well as a new limit on the branching fraction of the second-class current decay τ-→π-η'(958)ντ. We search for the decay mode τ-→K-η'(958)ντ and for five-prong decay modes with kaons, and place the first upper limits on their branching fractions.

Study of high-multiplicity three-prong and five-prong τ decays at BABAR / J. P., L., V., P., V., T., J., G.T., E., G., A., P., G., E., B., S., D. N., B., L. T., K., Kolomensky, Y.u.G., G., L., H., K., T., S., D. J., A., C., H., T. S., M., J. A., M., R. Y., S.o., A., K., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 86:(2012), pp. 092010-1-092010-16. [10.1103/PhysRevD.86.092010]

Study of high-multiplicity three-prong and five-prong τ decays at BABAR

LANCERI, LIVIO;VITALE, LORENZO;
2012-01-01

Abstract

We present measurements of the branching fractions of three-prong and five-prong τ decay modes using a sample of 430 million τ lepton pairs, corresponding to an integrated luminosity of 468fb-1, collected with the BABAR detector at the PEP-II asymmetric-energy e+e- storage rings at SLAC National Accelerator Laboratory. The τ-→(3π)-ηντ, τ-→(3π)-ωντ, and τ-→π-f1(1285)ντ branching fractions are presented, as well as a new limit on the branching fraction of the second-class current decay τ-→π-η'(958)ντ. We search for the decay mode τ-→K-η'(958)ντ and for five-prong decay modes with kaons, and place the first upper limits on their branching fractions.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2767936
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