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

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.

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

References in corpus (10)

• Heavy Quark Symmetry
• Radiative $D^{\ast }$ Decay Using Heavy Quark and Chiral Symmetry
• $D^{\ast }$ Radiative Decays and Strong Coupling of Heavy Mesons with Soft Pions in a QCD Relativistic Potential Model
• Production and Decay of D_1(2420)^0 and D_2^*(2460)^0
• The Isgur-Wise Function from the Lattice
• A Lattice Calculation of the Isgur-Wise Function
• Comparison of 1/mQ^2 Corrections in Mesons and Baryons
• Heavy Meson Hyperfine Splittings: A Puzzle for Heavy Quark Chiral Perturbation Theory
• Simply Modeling B -> K* gamma
• 1/m_c Expansion of Omega_b -> Omega_c^(*) Semileptonic Decay Form Factors

Cited by in corpus (7)

• A Constituent Quark-Meson Model for Heavy-Meson Processes
• Decays of the $B_c$ Meson in a Relativistic Quark-Meson Model
• Investigation of Semileptonic $B$ Meson Decay to P-Wave Charm Mesons
• Semi-leptonic B decays into higher charmed resonances
• Heavy Meson Electromagnetic Mass Differences from QCD
• Radiative decays of heavy and light mesons in a quark triangle approach
• Semileptonic Decay of $B$-Meson into $D^{\ast \ast }$ and the Bjorken Sum Rule