令人兴奋的有味道的束缚态
Exciting flavored bound states
摘要：
在彩虹阶梯截断框架下，利用红外质量有限相互作用研究了味单重态和味赝标介子的基态和径向激发，与最近由格点量子色动力学和Dyson-Schwinger方程得到的胶子修饰函数的结果一致.而基态质量和衰变常数的轻介子以及charmonia的描述，我们确认以前的观察，这种截断是不够的，以提供现实的预测光谱的激发态和异国情调。此外，我们还发现了激发态$D_{(s)}$介子的复共轭本征值对，这表明在重-轻系统和本文截断的情况下，相互作用核是非厄米性的。然而，限制自己的贝特-萨尔彼得振幅的主要贡献，我们发现一个合理的描述的魅力基态和它们各自的衰减常数。
英文摘要：
We study ground and radial excitations of flavor singlet and flavored pseudoscalar mesons within the framework of the rainbow-ladder truncation using an infrared massive and finite interaction in agreement with recent results for the gluon-dressing function from lattice QCD and Dyson-Schwinger equations. Whereas the ground-state masses and decay constants of the light mesons as well as charmonia are well described, we confirm previous observations that this truncation is inadequate to provide realistic predictions for the spectrum of excited and exotic states. Moreover, we find a complex conjugate pair of eigenvalues for the excited $D_{(s)}$ mesons, which indicates a non-Hermiticity of the interaction kernel in the case of heavy-light systems and the present truncation. Nevertheless, limiting ourselves to the leading contributions of the Bethe-Salpeter amplitudes, we find a reasonable description of the charmed ground states and their respective decay constants.
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