String point of view for heavy-light mesons
classification
✦ hep-ph
hep-exnucl-th
keywords
stringformulaheavy-lightlightmesonmesonsagreementapproximate
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An approximate rotational symmetry of a heavy-light meson is viewed from a string picture. Using a simple string configuration, we derive a formula, $(M-m_c)^2=\pi\sigma L$, whose coefficient of the r.h.s. is just 1/2 of that of a light meson with two light quarks. A numerical plot is obtained for $D$ mesons of experimental data as well as several theoretical models, which shows good agreement with this formula.
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