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

By J. P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, D. Derkach, G. Grosdidier, F. Le Diberder, A. M. Lutz, B. Malaescu, P. Roudeau, M. H. Schune, A. Stocchi, G. Wormser, D. Bernard, M. Verderi, S. Emery, G. Hamel De Monchenault, G. Vasseur, Ch. Yèche, S. Akar, E. Ben-Haim, M. Bomben, G.R. Bonneaud, H. Briand, G. Calderini, J. Chauvau, O. Hamon, Ph. Leruste, G. Marchiori, J. Ocariz and S. Sitt

Abstract

See paper for full ist of authorsWe 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

Topics: [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: American Physical Society
Year: 2012
DOI identifier: 10.1103/PhysRevD.86.092010
OAI identifier: oai:HAL:in2p3-00732411v1
Provided by: Hal-Diderot
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