We present a study of τ− → π−KS0KS0(π0)ντ and τ− → K−KS0KS0(π0)ντ decays using a dataset of 430 million τ lepton pairs, corresponding to an integrated luminosity of 468 fb−1, collected with the BABAR detector at the PEP-II asymmetric energy e+e− storage rings. We measure branching fractions of (2.31 ± 0.04 ± 0.08) × 10−4 and (1.60 ± 0.20 ± 0.22) × 10−5 for the τ− → π−KS0KS0ντ and τ− → π−KS0KS0π0ντ decays, respectively. We find no evidence for τ− → K−KS0KS0ντ and τ− → K−KS0KS0π0ντ decays and place upper limits on the branching fractions of 6.3 × 10−7 and 4.0 × 10−7 at the 90% confidence level.

Branching fraction of τ^{-}→π^{-}K_{s}^{0}K_{s}^{0}(π^{0})ν_{τ} decays / 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. 092013-1-092013-9. [10.1103/PhysRevD.86.092013]

Branching fraction of τ^{-}→π^{-}K_{s}^{0}K_{s}^{0}(π^{0})ν_{τ} decays

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

Abstract

We present a study of τ− → π−KS0KS0(π0)ντ and τ− → K−KS0KS0(π0)ντ decays using a dataset of 430 million τ lepton pairs, corresponding to an integrated luminosity of 468 fb−1, collected with the BABAR detector at the PEP-II asymmetric energy e+e− storage rings. We measure branching fractions of (2.31 ± 0.04 ± 0.08) × 10−4 and (1.60 ± 0.20 ± 0.22) × 10−5 for the τ− → π−KS0KS0ντ and τ− → π−KS0KS0π0ντ decays, respectively. We find no evidence for τ− → K−KS0KS0ντ and τ− → K−KS0KS0π0ντ decays and place upper limits on the branching fractions of 6.3 × 10−7 and 4.0 × 10−7 at the 90% confidence level.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2767935
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