What can a relativistic quark model tell us about charmed mesons?

Details What can a relativistic quark model tell us about charmed mesons? What can a relativistic quark model tell us about charmed mesons?

1994-10-19

arxiv.org/abs/hep-ph/9410324v1

Phys.Rev. D51 (1995) 5053-5063

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, LaTeX, figures in accompanying uuencoded PostScript file, UTPT-94-25

Scientific paper

10.1103/PhysRevD.51.5053

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.

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