Light-front holographic QCD provides a successful first approximation to hadron spectroscopy in the chiral limit of ($3+1$)-dim light-front QCD, where a holographic Schrödinger-like equation, with an emerging confining scale, $\kappa$, governs confinement in the transverse direction. In its supersymmetric formulation, light-front holography predicts that each baryon has two superpartners: a meson and a tetraquark, with their degenerate masses being generated by the same scale, $\kappa$. In nature, this mass degeneracy is lifted by chiral symmetry breaking and longitudinal confinement. In this paper, we show that the latter can be successfully captured by the ’t Hooft equation of ($1+1$)-dim, large $N_c$, QCD. Together, the holographic Schrödinger equation and the ’t Hooft equation provide a good global description of the data across the full hadron spectrum with a universal $\kappa$.

中文翻译：

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使用光前全息薛定谔方程和 't Hooft 方程的强子光谱

光前全息 QCD 成功地初步逼近了强子光谱在（$3+1$)-dim light-front QCD，其中全息薛定谔方程，具有新兴的限制尺度， $\kappa$，控制横向的限制。在其超对称公式中，光前全息术预测每个重子都有两个超级伙伴：介子和四夸克，它们的简并质量以相同的尺度产生，$\kappa$. 在自然界中，这种质量简并是通过手性对称破坏和纵向限制解除的。在本文中，我们表明后者可以通过 ($1+1$)-昏暗，大 $N_C$，QCD。全息薛定谔方程和 't Hooft 方程共同为整个强子谱中的数据提供了良好的全局描述，具有通用性$\kappa$.