String point of view for heavy-light mesons*
1 Institute of High Energy Physics, CAS, Beijing 100049, People’s Republic of China
2 Theoretical Physics Center for Science Facilities (TPCSF), CAS, People’s Republic of China
3 Tokyo Kasei University, 1-18-1 Kaga, Itabashi, Tokyo 173-8602, Japan
4 Theoretical Research Division, Nishina Center, RIKEN, Wako, Saitama 351-0198, Japan
Published online: 22 March 2017
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–mc)2 = πσL, whose coeffcient 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.
© The Authors, published by EDP Sciences, 2017
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