Phenomenological discussion of B→ P V decays in QCD improved factorization approach

2003/04/22 by R. Aleksan, Aleksan, R., P. F. Giraud +7
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0304205

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

arxiv created 2003/04/22 · arxiv updated 2009/11/30

Abstract

Trying 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 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 B⁰→ρ⁺ π^-, 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.

Related

• Global analysis of B-->PP, PV charmless decays with QCD factorization
• QCD factorization for B→πK decays
• Charmless B_c → PP, PV decays in the QCD factorization approach
• B→ Kπ decays
• B -> phi K decays in perturbative QCD approach