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 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 , 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.
Cite
@article{arxiv.hep-ph/0304205,
title = {Phenomenological discussion of $B\to P V$ decays in QCD improved factorization approach},
author = {R. Aleksan and P. F. Giraud and V. Morenas and O. Pene and A. S. Safir},
journal= {arXiv preprint arXiv:hep-ph/0304205},
year = {2007}
}
Comments
8 pages, 2 figures (requires epsfig, psfrag),talk presented at the XXXVIIIth Rencontres de Moriond: Electroweak Interactions and Unified Theories,Les Arcs, France, March 15-22, 2003. To be published in the Proceedings