Understanding B-->D*-NNbar and its implications
Abstract
The CLEO Collaboration recently reported the observation of the B0-->D*-pn¯ mode at a rate of only a factor of 4-5 lower than B0-->D*-ρ+ and D*-π+. We try to understand this with a factorization approach of current produced nucleon pairs. The baryon weak vector current form factors are related by isospin rotation to nucleon electromagnetic form factors. By using Gp,nM measured from e+e--->NbarN and ppbar-->e+e- processes, assuming factorization of the B0-->D*- transition and pn¯ pair production, we are able to account for up to 60% of the observed rate. The remainder is argued to arise from the axial vector current. The model is then applied to B decays to other mesons plus pn¯ modes and D*- plus strange baryon pairs.
- Publication:
-
Physical Review D
- Pub Date:
- February 2002
- DOI:
- 10.1103/PhysRevD.65.034003
- arXiv:
- arXiv:hep-ph/0107110
- Bibcode:
- 2002PhRvD..65c4003C
- Keywords:
-
- 13.25.Hw;
- 13.40.Gp;
- 14.20.Dh;
- Decays of bottom mesons;
- Electromagnetic form factors;
- Protons and neutrons;
- High Energy Physics - Phenomenology;
- Nuclear Theory
- E-Print:
- 12 pages, 10 figures. Version to appear in Phys. Rev. D