Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-01-20
Phys.Rev. D67 (2003) 094019
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, 4 figures; several typos corrected, added one footnote and two references, comments added about PQCD. To appear in P
Scientific paper
10.1103/PhysRevD.67.094019
We try a global fit of the experimental branching ratios and CP-asymmetries of the charmless $B\to PV$ decays according to QCD factorisation. We find it impossible to reach a satisfactory agreement, the confidence level (CL) of the best fit is smaller than .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 $\bar {B^0}\to\rho^+ \pi^-$, which is predicted very small by QCD factorisation. 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.
Aleksan Roy
Giraud Pierre-François
Morenas Vincent
Pene Olivier
Safir Salim A.
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