298 articles – 2321 Notices  [english version]
 HAL : in2p3-00011480, version 1
 arXiv : hep-ex/0107058
 International Symposium on Lepton and Photon Interactions at High Energies 20 Lepton Photon 01, Rome : Italie
 Measurement of $B^0$ decays to $\pi^+\pi^-\pi^0$
 BABAR Collaboration(s)
 (2001)
 We present preliminary results of searches for exclusive $B^0$ decays to $\pi^+\pi^-\pi^0$ among 22.7 million $b\overline{b}$ pairs collected by the BABAR experiment from electron-positron collisions near the $\Upsilon(4S)$ resonance. We measure $\cal{B}(\rho^\mp \pi^\pm) = (28.9\pm 5.4\pm 4.3)\times 10^{-6}$, and find no evidence for the presence of any other decay mode in the $\pi^+\pi^-\pi^0$ Dalitz plot. Upper limits are determined for the branching fractions of $B^0\to\rho^0\pi^0$, non-resonant $B^0$ decays to $\pi^+\pi^-\pi^0$ and of several discrete regions of $\pi^+\pi^-\pi^0$ phase-space. We also measure the direct CP-violating asymmetry between the rates of untagged $\rho^+\pi^-$ and $\rho^-\pi^+$, finding no significant evidence for an effect.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Lien vers le texte intégral : http://fr.arXiv.org/abs/hep-ex/0107058
 in2p3-00011480, version 1 http://hal.in2p3.fr/in2p3-00011480 oai:hal.in2p3.fr:in2p3-00011480 Contributeur : Nicole Berger <> Soumis le : Vendredi 3 Mai 2002, 11:32:08 Dernière modification le : Vendredi 3 Mai 2002, 11:32:08