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arXiv 1406.5804hep-ph
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HH \c{hi} PT中D* s0（2317）和D' s1（2460）强衰变的手征对称性破缺修正

Chiral symmetry-breaking corrections to strong decays of D*s0(2317) and D's1(2460) in HH\c{hi}PT

Jin-Yun Wu, Yong-Lu Liu, Jian-Rong Zhang, Ming-Qiu Huang

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摘要：

在重强子手征微扰理论框架下研究了两个窄介子$D_{s0}^{*}(2317)$和$D_{s1}^{'}(2460)$的强衰变.在$1/Λ_χ$中，通过拟合它们的非奇异配对物的实验宽度，提取了次主导阶的手征对称性破缺耦合常数。单π介子衰变宽度分别为$Γ(D_{s0}^{*}(2317)\to D_{s}^{+}π^{0})=9.2\pm2.3$ KeV和$Γ(D_{s1}^{'}(2460)\to D_{s}^{*+}π^{0})=9.0\pm2.1$ KeV，与实验约束一致，并与其它理论预言相当.数值分析表明，手征对称性对衰变宽度的修正是显著的。最后给出了相应的美介子的应用和预测。

英文摘要：

The strong decays of two narrow mesons $D_{s0}^{*}(2317)$ and $D_{s1}^{'}(2460)$ are studied within the framework of heavy hadron chiral perturbation theory. Up to next-to-leading order in $1/Λ_χ$, 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 $Γ(D_{s0}^{*}(2317)\to D_{s}^{+}π^{0})=9.2\pm2.3$ KeV and $Γ(D_{s1}^{'}(2460)\to D_{s}^{*+}π^{0})=9.0\pm2.1$ 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.

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