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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
Z J Ajaltouni1, O. Leitner1, P. Perret1, Cécile Rimbault1, A. W. Thomas
(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.
1 :  LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]
Physique/Physique des Hautes Energies - Phénoménologie
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/hep-ph/0302156