标题： 夸克质量矩阵的三零结构作为强CP问题的解决方案 显示英文标题

标题： Three-zero texture of quark-mass matrices as a solution to the strong CP problem

摘要： 强电荷宇称（CP）问题自1976年以来一直是粒子物理中的一个长期问题，说明了量子色动力学（QCD）中CP破坏相位很小。 轴子基于佩切-奎因机制，是解决这个问题最流行的方案。 在本文中，我们提出了一种替代解决方案，基于夸克质量矩阵的三个零结构，而无需额外的重夸克态，该结构已被证明能很好地符合数据。 我们表明，所需的三个零结构在具有$\mathbf{T}^2/\mathbb{Z}_3$轨道空间紧致化的六维时空中自然构建。 显示英文摘要

摘要： The strong charge-parity (CP) problem has been a long-standing problem in particle physics since 1976, illustrating the small CP-violation phase in quantum chromodynamics (QCD). The axion, based on the Peccei-Quinn mechanism, is the most popular solution to the problem. In this paper, we propose an alternative solution based on the three-zero texture of quark mass matrices without additional heavy quark states, which has been shown to fit data well. We show that the required three-zero texture is naturally constructed in a six-dimensional spacetime with a $\mathbf{T}^2/\mathbb{Z}_3$ orbifold compactification.