Invariant mass spectra of τ−→h−h−h+ντ decays

Using 342 fb⁻¹ of $e^{+}{e}^{-}$ annihilation data collected with the BaBar detector at the SLAC PEP-II electron-positron asymmetric energy collider operating at a center-of-mass energies near 10.58 GeV, we present the preliminary measurements of the invariant mass distributions of ${\tau }^{-}\to {\pi }^{-}{\pi }^{-}{\pi }^{+}{\nu }_{\tau }$, ${\tau }^{-}\to K^{-}{\pi }^{-}{\pi }^{+}{\nu }_{\tau }$, ${\tau }^{-}\to K^{-}{\pi }^{-}{K}^{+}{\nu }_{\tau }$ and ${\tau }^{-}\to K^{-}{K}^{-}{K}^{+}{\nu }_{\tau }$, where events with $K_S^0\to {\pi }^{+}{\pi }^{-}$ decays are excluded.