QCD factorization in charmless $B\rightarrow{PV}$ decays

Abstract : Performing a global fit of the experimental branching ratios and CP asymmetries of the charmless B ! PV decays according to QCD factorization, we find it impossible to reach a satisfactory agreement, the confidence level (CL) of the best fit being smaller than 0.1%. The main reason for this failure is the difficulty to accomodate several large experimental branching ratios of the strange channels. Furthermore, experiment was not able to exclude a large direct CP asymmetry in $\overline {B°}\rightarrow gamma+pi−, which is predicted very small by QCD factorisation. Then, trying a fit with QCD factorisation 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 : Wednesday, July 2, 2003 - 6:34:24 PM
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  • HAL Id : in2p3-00013783, version 1



R. Aleksan, P.F. Giraud, Vincent Morenas, O. Pene, S. Safir. QCD factorization in charmless $B\rightarrow{PV}$ decays. Workshop On The CKM Unitarity Triangle 2, Apr 2003, Durham, United Kingdom. pp.1-4. ⟨in2p3-00013783⟩



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