TY  - JOUR
AU  - BABAR Collaboration (del Amo Sanchez, P. et al
AU  - Lopez-March, N.
AU  - Martinez-Vidal, F.
AU  - Milanes, D. A.
AU  - Oyanguren, A.
PY  - 2011
DA  - 2011//
TI  - Studies of tau(-) -> eta K- nu(tau) and tau(-) -> eta pi(-) nu(tau) at BABAR and a search for a second-class current
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 032002
EP  - 10pp
VL  - 83
IS  - 3
PB  - Amer Physical Soc
AB  - We report on analyses of tau lepton decays tau(-) -> eta K- nu(tau) and tau(-) -> eta pi(-) nu(tau), with eta -> pi(+) pi(-) pi(0), using 470 fb(-1) of data from the BABAR experiment at PEP-II, collected at center-of-mass energies at and near the Y(4S) resonance. We measure the branching fraction for the tau(-) -> eta K- nu(tau) decay mode, B(tau(-) -> eta K- nu(tau)) = (1.42 +/- 0.11(stat) +/- 0.07(syst)) x 10(-4), and report a 95% confidence level upper limit for the second-class current process tau(-) -> eta pi(-) nu(tau), B(tau(-) -> eta pi(-) nu(tau)) < 9.9 x 10(-5).
SN  - 1550-7998
UR  - http://arxiv.org/abs/arXiv:1011.3917
UR  - https://doi.org/10.1103/PhysRevD.83.032002
DO  - 10.1103/PhysRevD.83.032002
LA  - English
N1  - ISI:000286883700003
ID  - BABARCollaborationdelAmoSanchez_etal2011
ER  -