Isospin analysis of B -> Dbar(*) D(*) K decays

Details Isospin analysis of B -> Dbar(*) D(*) K decays Isospin analysis of B -> Dbar(*) D(*) K decays

2004-01-05

arxiv.org/abs/hep-ph/0401014v3

Phys.Lett. B586 (2004) 314-322

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 5 postscript figures, submitted to Physics Letters B Reference 10 (C.W. Bauer et al.) added

Scientific paper

10.1016/j.physletb.2004.02.042

The peculiar isospin properties of the b -> c cbar s current lead to a rich set of isospin relations for the B -> Dbar(*) D(*) K decays which are presented here. Recent high quality experimental data on the complete set of these decays (22 measurements) are analysed in this context, the isospin relations are tested and the results for the isospin amplitudes are discussed. The comparison between the measured and expected branching fractions yields a new measurement of the ratio of branching fractions Br(Upsilon(4S) -> B+ B-)/Br(Upsilon(4S) -> B0 B0bar)}=0.86 +- 0.13. We finally discuss the implications of our findings for the measurement of sin(2 beta) and cos(2 beta) using these decays.

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