Eur. Phys. J. C (2007) 50: 617-628
https://doi.org/10.1140/epjc/s10052-007-0221-y

Regular Article - Theoretical Physics

D_sJ(2860) and D_sJ(2715)

Department of Physics, Peking University, Beijing, 100871, P.R. China

^* e-mail: liuxiang726@mail.nankai.edu.cn

Received: 1 October 2006
Revised: 9 January 2007
Published online: 6 March 2007

Abstract

Recently the Babar Collaboration reported a new cs̄ state, D_sJ(2860), and the Belle Collaboration observed D_sJ(2715). We investigate the strong decays of the excited cs̄ states using the ³ P ₀ model. After comparing the theoretical decay widths and decay patterns with the available experimental data, we are inclined to conclude that: (1) D_sJ(2715) is probably the 1^-(1³ D ₁) cs̄ state, although the 1^-(2³ S ₁) assignment is not completely excluded; (2) D_sJ(2860) seems unlikely to be the 1^-(2³ S ₁) and 1^-(1³ D ₁) candidate; (3) to consider D_sJ(2860) either as a 0⁺(2³ P ₀) or as a 3^-(1³ D ₃) cs̄ state is consistent with the experimental data; (4) the experimental search of D_sJ(2860) in the channels D_sη, DK^*, D^*K and D_s ^*η will be crucial to distinguish the above two possibilities.