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Effective restoration of chiral symmetry in excited mesons

机译:有效恢复激发介子中的手征对称性

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摘要

A fast restoration of chiral symmetry in excited mesons is demonstrated. A minimal "realistic" chirally symmetric confining model is used, where the only interaction between quarks is the linear instantaneous Lorentz-vector confining potential. The model is the 3+1 generalization of the 1+1 dimensional `t Hooft model. Chiral symmetry breaking is generated via the nonperturbative resummation of valence quarks self-energy loops and the meson bound states are obtained from the Bethe-Salpeter equation. The excited mesons fall into approximate chiral multiplets and lie on the approximately linear radial and angular Regge trajectories, though a significant deviation from the linearity of the angular trajectory is observed.
机译:演示了快速恢复激发介子中的手性对称性。使用最小的“现实”手对称对称约束模型,其中夸克之间的唯一相互作用是线性瞬时洛伦兹-矢量约束势。该模型是1 + 1维`t Hooft模型的3 + 1概化。通过价夸克自能循环的非扰动恢复生成手性对称性断裂,并从Bethe-Salpeter方程获得介子束缚态。激子介子落入近似手性多重态,并位于近似线性的径向和角度Regge轨迹上,尽管观察到与角度轨迹的线性度存在显着偏差。

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