Higher order corrections to QCD factorization in B ---> pi K, pi pi decays
Feb, 200220 pages
Published in:
- JHEP 02 (2002) 028
e-Print:
- hep-ph/0202128 [hep-ph]
Report number:
- CLNS-02-1777
View in:
Citations per year
Abstract:
The renormalon calculus is used to calculate the terms of order in the perturbative expansions of the Wilson coefficients and hard-scattering kernels entering the QCD factorization formula for hadronic B-meson decays into two light pseudoscalar mesons. The asymptotic behavior of the expansions is analyzed, and a minimal model of power corrections arising from soft ``non-factorizable'' gluon exchange to the B->pi K,pi pi decay amplitudes is obtained, which takes into account the structure of the leading and subleading infrared renormalon singularities. Whereas the resulting power corrections are generally very small, some of the strong-interaction phases of the hard-scattering kernels receive sizeable two-loop corrections. The implications of these findings on CP asymmetries and branching ratios are investigated.- B: hadronic decay
- pseudoscalar meson: pair production
- pi
- K
- quantum chromodynamics: perturbation theory
- factorization
- expansion: asymptotic behavior
- correction: higher-order
- amplitude analysis
- Borel transformation
References(25)
Figures(0)