https://hal.in2p3.fr/in2p3-00023414Aleksan, R.R.AleksanGiraud, P.F.P.F.GiraudMorenas, VincentVincentMorenasLPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand - UBP - UniversitĂ© Blaise Pascal - Clermont-Ferrand 2 - IN2P3 - Institut National de Physique NuclĂ©aire et de Physique des Particules du CNRS - CNRS - Centre National de la Recherche ScientifiquePene, O.O.PeneSafir, A.S.A.S.SafirPhenomenological discussion of $B\to P V$ decays in QCD improved factorization approachHAL CCSD2003[PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Pellet, Jeanine2004-12-09 16:21:342023-03-24 14:52:472004-12-10 09:39:51enConference papers1Trying a global fit of the experimental branching ratios and CP-asymmetries of the charmless $B\to PV$ decays according to QCD factorization, we find it impossible to reach a satisfactory agreement, the confidence level (CL) of the best fit is smaller than .1 %. This failure reflects the difficulty to accommodate several large experimental branching ratios of the strange channels. Furthermore, experiment was not able to exclude a large direct CP asymmetry in $\bar {B}^0\to\rho^+ \pi^-$, which is predicted very small by QCD factorization. Proposing a fit with QCD factorization complemented by a charming-penguin inspired model we reach a best fit which is not excluded by experiment (CL of about 8 %) but is not fully convincing. These negative results must be tempered by the remark that some of the experimental data used are recent and might still evolve significantly