Nonfactorizable Contributions to B (yields) (pi)(pi) Decays.

Feldman, T. ; Hurth, T.

Technical Information Center Oak Ridge Tennessee

关键词: Quantum chromodynamics;    Factorization;    Isospin;    Symmetry;   

RP-ID  :  DE2004833016

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We investigate to what extent the experimental information on B (yields) (pi)(pi) branching fractions and CP asymmetries can be used to better understand the QCD dynamics in these decays. For this purpose we decompose the independent isospin amplitudes into factorizable and non-factorizable contributions. The former can be estimated within the framework of QCD factorization for exclusive B decays. The latter vanish in the heavy-quark limit, m(sub b) (yields) (infinity), and are treated as unknown hadronic parameters. We discuss at some length in which way the non-factorizable contributions are treated in different theoretical and phenomenological frameworks.