Extracting CKM phases and B-s-(B)over-bar-(s) mixing parameters from angular distributions of non-leptonic B decays

Citation
As. Dighe et al., Extracting CKM phases and B-s-(B)over-bar-(s) mixing parameters from angular distributions of non-leptonic B decays, EUR PHY J C, 6(4), 1999, pp. 647-662
Citations number
80
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
14346044 → ACNP
Volume
6
Issue
4
Year of publication
1999
Pages
647 - 662
Database
ISI
SICI code
1434-6044(199901)6:4<647:ECPABM>2.0.ZU;2-I
Abstract
Suggestions for efficiently determining the lifetimes and mass difference o f the light and heavy B-s mesons (B-s(L) , B-s(H)) from B-s --> J/psi phi, Ds*+Ds*- decays are given. Using appropriate weighting functions for thf an gular distributions of the decay products (moment analysis), one can extrac t (Gamma(H); Gamma(L); Delta m)(Bs). Such a moment analysis allows the dete rmination of the relative magnitudes and phases of the CP-odd and CP even d ecay amplitudes. Efficient determinations of CP-violating effects occuring in B-s --> J/psi phi, Ds*+Ds*- are discussed in the light of a possible wid th difference (Delta Gamma)(Bs), and the utility of this method for B --> J /psi K*, D-s(*+)(D) over bar* decays is noted. Since our approach is very g eneral, it can in principle be applied to all kinds of angular distribution s and allows the determination of all relevant observables, including funda mental CKM (Cabibbo-Kobayashi-Maskawa) parameters: as well as tests of vari ous aspects of the factorization hypothesis. Explicit angular distributions and weighting functions are given, and the general method that can be used for any angular distribution is indicated.