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Conference Papers Year : 2003

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

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1
R. Aleksan
  • Function : Author
P.F. Giraud
  • Function : Author
O. Pene
  • Function : Author
A.S. Safir
  • Function : Author

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

Dates and versions

in2p3-00023414 , version 1 (09-12-2004)

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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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