论文标题
低洼的双重重型重子：regge关系和质量缩放
Low-lying doubly heavy baryons: Regge relation and mass scaling
论文作者
论文摘要
在重型 - $ light-quark的框架中，我们探索了含有两个重夸克（$ qq^{\ prime} = cc，cc，bb，bc $）的激动的baryons $ qq^{\ prime} q $，通过将regge轨迹的方法与触发式矫正的方法结合到应有的重量互动中。在QCD字符串图片中半经典地构造了两个线性和另一种非线性关系，并且基于重型diquark繁重的古夸克对称性在QCD字符串图片中构造，在双重重型的baryons和重型中心之间采用了质量缩放关系。我们采用了与观察到的双重迷人的Baryon $ξ_{cc} $和沉重Quarkonia的光谱兼容的地面质量估计，以确定重对的轨迹参数和结合能的轨迹参数和结合能，从而确定了兴奋的Baryons $ eCt $ eCq^{QQ^{\ PREME的低层质量$ω__{qq^{\ prime}} $最多2 s和1p的激发弹药和重型diquark。根据重型和轻夸克动力学之间绝热膨胀的性质，发现重型diquark激发的水平间距通常比轻夸克激发小。
In framework of heavy-diquark$-$light-quark endowed with heavy-pair binding, we explore excited baryons $QQ^{\prime}q$ containing two heavy quarks ($QQ^{\prime}=cc,bb,bc$) by combining the method of Regge trajectory with the perturbative correction due to the heavy-pair interaction in baryons. Two Regge relations, one linear and the other nonlinear, are constructed semi-classically in the QCD string picture, and a mass scaling relation based on the heavy diquark-heavy antiquark symmetry are employed between the doubly heavy baryons and heavy mesons. We employ the ground-state mass estimates compatible with the observed doubly charmed baryon $Ξ_{cc}$ and spectra of the heavy quarkonia to determine the trajectory parameters and the binding energies of the heavy pair, and thereby compute the low-lying masses of the excited baryons $Ξ_{QQ^{\prime}}$ and $Ω_{QQ^{\prime}}$ up to 2S and 1P excitations of the light quark and heavy diquark. The level spacings of heavy diquark excitations are found to be smaller generally than that of the light-quark excitations, in according with the nature of adiabatic expansion between the heavy and light-quark dynamics.
