F. Couderc

Observation of Decays B{sup 0}{yields}D{sub s}{sup (*)+}{pi}{sup -} and B{sup 0}{yields}D{sub s}{sup (*)-}K{sup +}

We report the observation of decays B{sup 0}{yields}D{sub s}{sup (*)+}{pi}{sup -} and B{sup 0}{yields}D{sub s}{sup (*)-}K{sup +} in a sample of 230x10{sup 6} {upsilon}(4S){yields}BB events recorded with the BABAR detector at the SLAC PEP-II asymmetric-energy e{sup +}e{sup -} storage ring. We measure the branching fractions B(B{sup 0}{yields}D{sub s}{sup +}{pi}{sup -})=(1.3{+-}0.3(stat){+-}0.2(syst))x10{sup -5}, B(B{sup 0}{yields}D{sub s}{sup -}K{sup +})=(2.5{+-}0.4(stat){+-}0.4(syst))x10{sup -5}, B(B{sup 0}{yields}D{sub s}*{sup +}{pi}{sup -})=(2.8{+-}0.6(stat){+-}0.5(syst))x10{sup -5}, and B(B{sup 0}{yields}D{sub s}*{sup -}K{sup +})=(2.0{+-}0.5(stat){+-}0.4(syst))x10{sup -5}. The significances of the measurements to differ from zero are 5, 9, 6, and 5 standard deviations, respectively. This is the first observation of B{sup 0}{yields}D{sub s}{sup +}{pi}{sup -}, B{sup 0}{yields}D{sub s}*{sup +}{pi}{sup -}, and B{sup 0}{yields}D{sub s}*{sup -}K{sup +} decays.

Search for Lepton Flavor Violating Decays {tau}{sup {+-}}{yields}l{sup {+-}}{pi}{sup 0}, l{sup {+-}}{eta}, l{sup {+-}}{eta}{sup '}

A search for lepton flavor violating decays of the {tau} lepton to a lighter mass lepton and a pseudoscalar meson has been performed using 339 fb{sup -1} of e{sup +}e{sup -} annihilation data collected at a center-of-mass energy near 10.58 GeV by the BABAR detector at the SLAC PEP-II storage ring. No evidence of a signal has been found, and upper limits on the branching fractions are set at the 10{sup -7} level.A search for lepton flavor violating decays of the tau lepton to a lighter mass lepton and a pseudoscalar meson has been performed using 339 fb;{-1} of e;{+}e;{-} annihilation data collected at a center-of-mass energy near 10.58 GeV by the BABAR detector at the SLAC PEP-II storage ring. No evidence of a signal has been found, and upper limits on the branching fractions are set at the 10;{-7} level.

Search for the reactions e{sup +}e{sup -}{yields}{mu}{sup +}{tau}{sup -} and e{sup +}e{sup -}{yields}e{sup +}{tau}{sup -}

We report on a search for the lepton-flavor-violating processes e+e- -> mu+ tau- and e^+e^- -> e+ tau-. The data sample corresponds to an integrated luminosity of 211 fb

Measurements of {lambda}{sub c}{sup +} branching fractions of Cabibbo-suppressed decay modes involving {lambda} and {sigma}{sup 0}

^{-1}

Branching fraction measurement of B{sup 0}{yields}D{sup (*)+}{pi}{sup -} and B{sup -}{yields}D{sup (*)0}{pi}{sup -} and isospin analysis of B{yields}D{sup (*)}{pi} decays

recorded by the BaBar experiment at the SLAC PEP-II asymmetric-energy B Factory at a center-of-mass energy of

Measurements of the Absolute Branching Fractions of B{sup {+-}}{yields}K{sup {+-}}X{sub cc}

\sqrt{s} = 10.58

Search For T, CP, and CPT Violation in B{sup 0}-B{sup 0} Mixing with Inclusive Dilepton Events

GeV. We find no evidence for a signal and set the 95% confidence level upper limits on the cross sections to be

Observation of B{sup +}{yields}K{sup 0}K{sup +} and B{sup 0}{yields}K{sup 0}K{sup 0}

\sigma_{\mu\tau} <4.6

Observation of B{sup +}{yields}{phi}{phi}K{sup +} and Evidence for B{sup 0}{yields}{phi}{phi}K{sup 0} below {eta}{sub c} Threshold

fb and

Search for the Rare Decay B{sup 0}{yields}{tau}{sup +}{tau}{sup -} at BABAR

\sigma_{e\tau} <10.1