Studies of tau- -> eta.K-.nu and tau- -> eta.pi-.nu at BaBar and a search for a second-class current

The BaBar Collaboration, P. del Amo Sanchez

We report on analyses of tau lepton decays ${\tau }^{-}\to \eta K^{-}{\nu }_{\tau }$ and ${\tau }^{-}\to \eta {\pi }^{-}{\nu }_{\tau }$, with $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$, using 470 fb${}^{-1}$ of data from the Babar experiment at PEP-II, coll…