Abstract
We consider two SU(3) breaking parameters and appearing in a relation between and amplitudes, which plays an important role in determining the weak phase In the heavy quark limit, we identify an isospin-related quantity measured in D decays, exhibiting large SU(3) breaking which is likely due to nonfactorizable effects. Applying heavy quark symmetry to semileptonic D and B decay form factors, we find that factorizable SU(3) breaking in may be significantly larger than estimated from certain model calculations of form factors.
- Received 6 April 2000
DOI:https://doi.org/10.1103/PhysRevD.62.077301
©2000 American Physical Society