L. Bosisio

Measurement of B→K*(892)γ Branching Fractions and CP and Isospin Asymmetries

B. Aubert, Y. Karyotakis, J. P. Lees, V. Poireau et autres

We present an analysis of the decays ${B}^{0}\ensuremath{\rightarrow}{K}^{*0}(892)\ensuremath{\gamma}$ and ${B}^{+}\ensuremath{\rightarrow}{K}^{*+}(892)\ensuremath{\gamma}$ using a sample of about $383\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ events collected with the BABAR detector at the PEP-II asymmetric energy $B$ factory. We measure the branching fractions $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}{K}^{*0}\ensuremath{\gamma})=(4.47\ifmmode\pm\else\textpm\fi{}0.10\ifmmode\pm\else\textpm\fi{}0.16)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$ and $\mathcal{B}({B}^{+}\ensuremath{\rightarrow}{K}^{*+}\ensuremath{\gamma})=(4.22\ifmmode\pm\else\textpm\fi{}0.14\ifmmode\pm\else\textpm\fi{}0.16)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$. We constrain the direct …

fr, es, it, no, us, gb, de, ca, ru (code pays fourni par la source)

Search for B -meson decays to b1ρ and b1K*

B. Aubert, Y. Karyotakis, J. P. Lees, V. Poireau et autres

We present a search for decays of $B$ mesons to final states with a ${b}_{1}$ meson and a $\ensuremath{\rho}$ or ${K}^{*}(892)$ meson. The search is based on a data sample consisting of 465 million $B\overline{B}$ pairs collected by the BABAR detector at …

fr, es, it, no, us, gb, de, ca, ru (code pays fourni par la source)

Search for B→K*νν¯ decays

B. Aubert, M. Bóna, Y. Karyotakis, J. P. Lees et autres

We present a search for the decays $B\ensuremath{\rightarrow}{K}^{*}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ using $454\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs collected at the $\ensuremath{\Upsilon}(4S)$ resonance with the BABAR detector at the SLAC PEP-II $B$-Factory. We first select an event sample where one $B$ is reconstructed in a semileptonic or hadronic mode …

Measurement of Time-Dependent CP Asymmetries and the CP -Odd Fraction in the Decay B0→D*+D*−

B. Aubert, R. Barate, D. Boutigny, F. Couderc et autres

We present an updated measurement of time-dependent $CP$ asymmetries and the $CP$-odd fraction in the decay ${B}^{0}\ensuremath{\rightarrow}{D}^{*+}{D}^{*\ensuremath{-}}$ using $232\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs collected by the BABAR detector at the SLAC PEP-II $B$ factory. We determine the $CP$-odd fraction to be $0.125\ifmmode\pm\else\textpm\fi{}0.044(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.007(\mathrm{syst})$. The time-dependent $CP$ …

fr (code pays fourni par la source)

Precision measurement of the Λc+ baryon mass

B. Aubert, R. Barate, D. Boutigny, F. Couderc et autres

The ${\ensuremath{\Lambda}}_{c}^{+}$ baryon mass is measured using ${\ensuremath{\Lambda}}_{c}^{+}\ensuremath{\rightarrow}\ensuremath{\Lambda}{K}_{S}^{0}{K}^{+}$ and ${\ensuremath{\Lambda}}_{c}^{+}\ensuremath{\rightarrow}{\ensuremath{\Sigma}}^{0}{K}_{S}^{0}{K}^{+}$ decays reconstructed in $232\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data collected with the BABAR detector at the PEP-II asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ storage ring. The ${\ensuremath{\Lambda}}_{c}^{+}$ mass is measured to be $2286.46\ifmmode\pm\else\textpm\fi{}0.14\text{ }\text{ }\mathrm{MeV}/{c}^{2}$. The dominant …

es, fr, it, cn, no, us, gb, de, ca, ru (code pays fourni par la source)

Search for the rare decays B+→D(*)+KS0

B. Aubert, R. Barate, D. Boutigny, F. Couderc et autres

We report on the search for the rare decays ${B}^{+}\ensuremath{\rightarrow}{D}^{(*)+}{K}_{S}^{0}$ in approximately $226\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\Upsilon}(4S)\ensuremath{\rightarrow}B\overline{B}$ decays collected with the BABAR detector at the PEP-II asymmetric-energy $B$ factory at SLAC. We do not observe any significant signal and we set 90% confidence-level upper limits …

es, it, no, us, gb, de, ca, ru (code pays fourni par la source)