Chiral perturbation theory for SU(3) breaking in heavy-meson systems
Abstract
The SU(3)-breaking effects due to light-quark masses on heavy-meson masses, decay constants (FD,FDs), and the form factor for semileptonic B¯-->D(*)lν¯l transitions are formulated in chiral perturbation theory, using a heavy-meson effective Lagrangian and expanding in inverse powers of the heavy-meson mass. To leading order in this expansion, the leading chiral logarithms and the required counterterms are determined. At this level, a nonanalytic correction to the mass splittings of O(p3) appears, similar to the one found in light baryons. The correction to FDs/FD is roughly estimated to be of the order of 10% and, therefore, experimentally accessible, while the correction to the form factor is likely to be substantially smaller. We explicitly check that the heavy-quark symmetry is preserved by the chiral loops.
- Publication:
-
Physical Review D
- Pub Date:
- November 1992
- DOI:
- 10.1103/PhysRevD.46.3929
- arXiv:
- arXiv:hep-ph/9206230
- Bibcode:
- 1992PhRvD..46.3929G
- Keywords:
-
- 11.30.Rd;
- 11.30.Hv;
- 13.20.-v;
- 14.40.Jz;
- Chiral symmetries;
- Flavor symmetries;
- Leptonic semileptonic and radiative decays of mesons;
- High Energy Physics - Phenomenology
- E-Print:
- 21 pages