723 articles – 3322 Notices  [english version]
 HAL : hal-00008759, version 1
 arXiv : hep-ph/0302156
 European Physical Journal C 29 (2003) 215-233
 Direct CP violation in $B\to \pi^+\pi^- V$ with $\rho^0 - \omega$ mixing effects: phenomenological approach
 (2003)
 We present a detailed study of direct CP violation and branching ratios in the channels $B^{0,\pm} \to \pi^{+}\pi^{-} V^{0,\pm}$, where $V$ is a vector meson ($K^{* 0,\pm}$ or $\rho^{\pm}$). Emphasis is placed upon the important role played by ${{\rho}^{0}}-{\omega}$ mixing effects in the estimation of the CP-violating asymmetry parameter, $a_{cp}$, associated with the difference of $B$ and $\bar B$ decay amplitudes. A thorough study of the helicity amplitudes is presented as a function of the pion-pion invariant mass. All of the calculations and simulations considered correspond to channels which will be analyzed at the LHCb facility.
 Domaine : Physique/Physique des Hautes Energies - Phénoménologie
 Lien vers le texte intégral : http://fr.arXiv.org/abs/hep-ph/0302156
 hal-00008759, version 1 http://hal.archives-ouvertes.fr/hal-00008759 oai:hal.archives-ouvertes.fr:hal-00008759 Contributeur : Import arXiv <> Soumis le : Mercredi 14 Septembre 2005, 16:14:04 Dernière modification le : Mardi 27 Juin 2006, 14:35:15