What can a relativistic quark model tell us about charmed mesons?
نویسندگان
چکیده
A relativistic quark model is extended to incorporate chiral and gauge symmetries. We obtain the DD∗π and DD∗γ couplings and find that the ratio Γ(D∗0 → D0π0)/Γ(D∗0 → D0γ) constrains the charm-quark mass close to 1.45 GeV. Large 1/mc corrections appear in the heavy-quark contribution to the DD ∗γ 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 B 0 → D(∗)πlν appear to be large enough to account for the discrepancy. a [email protected] b [email protected] c [email protected] d [email protected]
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عنوان ژورنال:
- Physical review. D, Particles and fields
دوره 51 9 شماره
صفحات -
تاریخ انتشار 1995