arXiv:hep-ph/9410324·v1·High Energy Physics — Phenomenology
What can a relativistic quark model tell us about charmed mesons?
M. Sutherland🇨🇦 · B. Holdom🇨🇦 · S. Jaimungal🇨🇦 · Randy Lewis🇨🇦
Abstract
A relativistic quark model is extended to incorporate chiral and gauge symmetries. We obtain the DD*pi and DD*gamma couplings and find that the ratio Gamma(D*0->D0pi0)/Gamma(D*0->D0gamma) constrains the charm-quark mass close to 1.45 GeV. Large 1/mc corrections appear in the heavy-quark contribution to the DD*gamma coupling. The model is extended further to describe seven excited D meson states. We find that semileptonic B decays into the ground and excited D meson states do not account for the total semileptonic decay width of the B0. The nonresonant contributions to the processes B0->D(*)pi+ell+nu appear to be large enough to account for the discrepancy.
Comments: 19 pages, LaTeX, figures in accompanying uuencoded PostScript file, UTPT-94-25