Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-09-08
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, LaTeX, uses epsf.sty, one eps figure, plenary talk at the b20 Symposium, Chicago, July 1997
Scientific paper
10.1063/1.55102
Exclusive non-leptonic two-body decays are discussed on the basis of a generalized factorization approach which also includes non-factorizeable contributions. Numerous decay processes can be described satisfactorily. The success of the method makes possible the determination of decay constants from non-leptonic decays. In particular, we obtain f_{D_s}=(234+-25) MeV and f_{D^*_s}=(271+-33) MeV. The observed constructive and destructive interference pattern in charged B- and D-decays, respectively, can be understood in terms of the different alpha_s-values governing the interaction among the quarks. The running of alpha_s is also the cause of the observed strong increase of the amplitude of lowest isospin when going to low energy transitions.
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