Phenomenological discussion of $B\to P V$ decays in QCD improved factorization approach

Abstract : Trying 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
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Submitted on : Thursday, December 9, 2004 - 4:21:34 PM
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R. Aleksan, P.F. Giraud, Vincent Morenas, O. Pene, A.S. Safir. Phenomenological discussion of $B\to P V$ decays in QCD improved factorization approach. 38th Rencontres De Moriond On Electroweak Interactions And Unified Theories, Mar 2003, Les Arcs, France. pp.1-8. ⟨in2p3-00023414⟩

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