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Conference Papers Year : 2003

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

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


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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in2p3-00013783 , version 1 (02-07-2003)


  • 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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