Implications of recent B^{0}>D^{(*)0}X^{0} measurements
Abstract
The recent measurements of the colorsuppressed modes B^{0}>D^{(*)0}π^{0} imply nonvanishing relative finalstate interaction (FSI) phases among various Bbar>Dπ decay amplitudes. Depending on whether or not FSIs are implemented in the topological quarkdiagram amplitudes, two solutions for the parameters a_{1} and a_{2} are extracted from data using various formfactor models. It is found that \a_{2}(Dπ)\~0.350.60 and \a_{2}(D^{*}π)\~0.250.50 with a relative phase of order 60° between a_{1} and a_{2}. If FSIs are not included in quarkdiagram amplitudes from the outset, a^{eff}_{2}/a^{eff}_{1} and a^{eff}_{2} will become smaller. The large value of \a_{2}(Dπ)\ compared to \a^{eff}_{2}(Dπ)\ or naive expectation implies the importance of longdistance FSI contributions to colorsuppressed internal W emission via finalstate rescatterings of the colorallowed tree amplitude.
 Publication:

Physical Review D
 Pub Date:
 May 2002
 DOI:
 10.1103/PhysRevD.65.094012
 arXiv:
 arXiv:hepph/0108096
 Bibcode:
 2002PhRvD..65i4012C
 Keywords:

 13.25.k;
 13.25.Hw;
 Hadronic decays of mesons;
 Decays of bottom mesons;
 High Energy Physics  Phenomenology;
 High Energy Physics  Experiment
 EPrint:
 17 pages. The Introduction is substantially revised and the order of the presentation in Sec. 2 is rearranged. To appear in Phys. Rev