Annihilation effects inB→ππfrom QCD light-cone sum rules

2005/09/30 by A. Khodjamirian, Th. Mannel, M. Melcher +3 · 2 citations
Physics and Astronomy · #Amplitude #Annihilation #Hadron #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #hep-ph

paper · pdf · doi:10.1103/physrevd.72.094012

published as Phys.Rev.D72:094012,2005 · two references added, a few misprints corrected, 38 pages, 29 figures

openalex publication_date 2005/11/16 · arxiv created 2005/11/17 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Using the method of QCD light-cone sum rules, we calculate the B\ensuremath→\ensuremathπ\ensuremathπ hadronic matrix elements with annihilation topology. We obtain a finite result, including the related strong phase. Numerically, the annihilation effects in B\ensuremath→\ensuremathπ\ensuremathπ turn out to be small with respect to the factorizable emission mechanism. Our predictions, together with the earlier sum rule estimates of emission and penguin contributions, are used for the phenomenological analysis of B\ensuremath→\ensuremathπ\ensuremathπ channels. We predict a \ensuremathΔI=1/2 transition amplitude which significantly differs from this amplitude extracted from the current data.

Citations

• CP violation and the CKM matrix: assessing the impact of the asymmetric B factories
• Soft contribution to the pion form factor from light-cone QCD sum rules
• QCD factorization in B→πK, ππ decays and extraction of Wolfenstein parameters
• QCD Factorization forB→ππDecays: Strong Phases andCPViolation in the Heavy Quark Limit
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

Cited by

• B, D and K decays
• Exclusive Charmless B Decays in QCD