Chiral symmetry-breaking corrections to strong decays of D*s0(2317) and D's1(2460) in HHḩi}PT

Abstract

The strong decays of two narrow mesons $D_{s0}^{\ast }(2317)$ and $D_{s1}^{{}^{\prime }}(2460)$ are studied within the framework of heavy hadron chiral perturbation theory. Up to next-to-leading order in $1/{\Lambda }_{\chi }$, by a fit to the experimental widths of their nonstrange partners, the chiral symmetry-breaking coupling constants are extracted. The single-pion decay widths are estimated to be $\Gamma (D_{s0}^{\ast }(2317)\to D_s^{+}{\pi }^0)=9.2\pm 2.3$ KeV and $\Gamma (D_{s1}^{{}^{\prime }}(2460)\to D_s^{\ast +}{\pi }^0)=9.0\pm 2.1$ KeV, respectively, which are consistent with the experimental constraints and comparable with other theoretical predictions. The numerical analysis shows that chiral-symmetry corrections to the decay widths are significant. Applications and predictions for the corresponding beauty mesons are also provided.

Comments: 16 pages, 3figures, LaTeX