Testing QCD factorization and charming penguins in charmless B ---> PV - INSPIRE

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Testing QCD factorization and charming penguins in charmless B ---> PV

Jan, 2003

22 pages

Published in:

Phys.Rev.D 67 (2003) 094019

e-Print:

hep-ph/0301165 [hep-ph]

DOI:

10.1103/PhysRevD.67.094019

Report number:

DAPNIA-02-380,
LPT-ORSAY-02-122,
LMU-02-19,
PCCF-RI-0218

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Abstract: (arXiv)

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.

Note:

21 pages, 4 figures; several typos corrected, added one footnote and two references, comments added about PQCD. To appear in Phys.Rev. D

13.25.Hw
B: hadronic decay
final state: two-particle
final state: (0charm)
pseudoscalar meson
vector meson
B: branching ratio
CP: violation
quantum chromodynamics: factorization
amplitude analysis

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