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

Abstract : We present measurements of the branching fractions of 3-prong and 5-prong tau decay modes using a sample of 430 million tau 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. The \tau- --> (3\pi)- \eta \nu, \tau- --> (3\pi)- \omega \nu, and \tau- --> \pi- f_1(1285)\nu, branching fractions are presented as well as a new limit on the branching fraction of the isospin-forbidden, second-class current, \tau- --> \pi-\eta'(958)\nu, decay. We find no evidence for charged kaons in these decay modes and place the first upper limits on their branching fractions.
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http://hal.in2p3.fr/in2p3-00732411
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Submitted on : Friday, September 14, 2012 - 3:41:10 PM
Last modification on : Tuesday, May 14, 2019 - 10:47:37 AM

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J. P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Study of high-multiplicity three-prong and five-prong tau decays at BABAR. Physical Review D, American Physical Society, 2012, 86, pp.092010. ⟨10.1103/PhysRevD.86.092010⟩. ⟨in2p3-00732411⟩

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