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Title: | Branching fraction of τ− → π−K0sK0s(π0)ντ decays |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Leptons (Física nuclear) Física de partícules Experiments Leptons (Nuclear physics) Particle physics Experiments |
Issue Date: | 26-Nov-2012 |
Publisher: | American Physical Society |
Abstract: | We present a study of τ − → π − K 0 S K 0 S ( π 0 ) ν τ and τ − → K − K 0 S K 0 S ( π 0 ) ν τ decays using a data set 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 − K 0 S K 0 S ν τ and τ − → π − K 0 S K 0 S π 0 ν τ decays, respectively. We find no evidence for τ − → K − K 0 S K 0 S ν τ and τ − → K − K 0 S K 0 S π 0 ν τ decays and place upper limits on the branching fractions of 6.3 × 10 − 7 and 4.0 × 10 − 7 at the 90% confidence level. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.86.092013 |
It is part of: | Physical Review D, 2012, vol. 86, num. 9, p. 092013 |
URI: | http://hdl.handle.net/2445/131705 |
Related resource: | https://doi.org/10.1103/PhysRevD.86.092013 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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