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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/131704
Study of high-multiplicity three-prong and five-prong τ decays at BABAR
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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 468 fb − 1 , collected with the BABAR detector at the PEP-II asymmetric-energy e + e − storage rings at SLAC National Accelerator Laboratory. The τ − → ( 3 π ) − η ν τ , τ − → ( 3 π ) − ω ν τ , and τ − → π − f 1 ( 1285 ) ν τ branching fractions are presented, as well as a new limit on the branching fraction of the second-class current decay τ − → π − η ′ ( 958 ) ν τ . We search for the decay mode τ − → K − η ′ ( 958 ) ν τ and for five-prong decay modes with kaons, and place the first upper limits on their branching fractions.
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GARRA TICÓ, Jordi, GRAUGÉS POUS, Eugeni and BABAR Collaboration. Study of high-multiplicity three-prong and five-prong τ decays at BABAR. Physical Review D. 2012. Vol. 86, num. 9, pags. 092010. ISSN 1550-7998. [consulted: 12 of October of 2026]. Available at: https://hdl.handle.net/2445/131704