Possible 2S and 1D charmed and charmed-strange mesons

Abstract

Possible $2S$ and $1D$ excited $D$ and $D_s$ states are studied, the charmed states $D(2550{)}^0$, $D^{\ast }(2600)$, $D(2750{)}^0$ and $D^{\ast }(2760)$ newly observed by the BaBar Collaboration are analyzed. The masses of these states are explored within the Regge trajectory phenomenology, and the strong decay widths are computed through the method proposed by Eichten {\it et al.}\cite{Eichten}. Both the mass and the decay width indicate that $D(2550{)}^0$ is a good candidate of $2^1{S}_0$. $D^{\ast }(2600)$ and $D_{s1}^{\ast }(2700{)}^{\pm }$ are very possible the admixtures of $2^3{S}_1$ and $1^3{D}_1$ with $J^P=1^{-}$ and a mixing angle $\varphi \approx 19^0$. $D^{\ast }(2760)$ and $D_{sJ}^{\ast }(2860{)}^{\pm }$ are possible the $1^3{D}_3$ $D$ and $D_s$, respectively. $D(2750{)}^0$ and $D^{\ast }(2760)$ seem two different states, and $D(2750{)}^0$ is very possible the $1D(2^{-},\frac{5}{2})$ though the possibility of $1D(2^{-},\frac{3}{2})$ has not been excluded. There may exist an unobserved meson $D_{sJ}(2850{)}^{\pm }$ corresponding to $D_{sJ}^{\ast }(2860{)}^{\pm }$.

6 pages, 5 tables, 4 figures, RevTex

References in corpus (12)

• Quarkonia and their transitions
• Observation of new resonances decaying to $D\pi$ and $D^{\ast }\pi$ in inclusive $e^{+}{e}^{-}$ collisions near $\sqrt{s}=$10.58 GeV
• $D_{sJ}(2860)$ and $D_{sJ}(2715)$
• The newly observed open-charm states in quark model
• Canonical Interpretation of the D_{sJ}(2860) and D_{sJ}(2690)
• $D_{sJ}(2860)$ resonance and the $s_{\ell }^P={\frac{5}{2}}^{-}$ $c\bar{s}$ ($c\bar{q}$) doublet
• D_{sJ}(2860) as the first radial excitation of the D_{s0}^*(2317)
• Newly observed D_{sJ}(3040) and the radial excitations of P-wave charmed-strange mesons
• Newly observed D(2550), D(2610), and D(2760) as 2S and 1D charmed mesons
• Strong decays of the newly observed $D(2550)$, $D(2600)$, $D(2750)$, and $D(2760)$
• Interpretation of $D_{sJ}(2632{)}^{+}$, $D_{s1}(2700{)}^{\pm }$, $D_{sJ}^{\star }(2860{)}^{+}$ and $D_{sJ}(3040{)}^{+}$
• Analysis of strong decays of the charmed mesons D(2550), D(2600), D(2750) and D(2760)