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Studies of τ-→ηK-ντ and τ-→ηπ-ντ at BABAR and a search for a second-class current

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del Amo Sanchez, P., Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M. et al.

. (2011) Studies of τ-→ηK-ντ and τ-→ηπ-ντ at BABAR and a search for a second-class current. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.83 (No.3). 032002 . ISSN 1550-7998

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Official URL: http://dx.doi.org/10.1103/PhysRevD.83.032002

Abstract

We report on analyses of tau lepton decays τ-→ηK-ντ and τ-→ηπ-ντ, with η→π+π-π0, using 470 fb-1 of data from the BABAR experiment at PEP-II, collected at center-of-mass energies at and near the Υ(4S) resonance. We measure the branching fraction for the τ-→ηK-ντ decay mode, B(τ-→ηK-ντ)=(1.42±0.11(stat)±0.07(syst))×10-4, and report a 95% confidence level upper limit for the second-class current process τ-→ηπ-ντ, B(τ-→ηπ-ντ)<9.9×10-5.

Item Type:

Journal Article

Subjects:

Q Science > QC Physics

Divisions:

Faculty of Science > Physics

Journal or Publication Title:

Physical Review D (Particles, Fields, Gravitation and Cosmology)

Publisher:

American Physical Society

ISSN:

1550-7998