Department of Physics, Kyung Hee University, Seoul 130-701, Korea.
Phys Rev Lett. 2013 Jul 19;111(3):031801. doi: 10.1103/PhysRevLett.111.031801. Epub 2013 Jul 18.
We show that the hierarchically small μ term in supersymmetric theories is a consequence of two identical pairs of Higgs doublets taking a democratic form for their mass matrix. We briefly discuss the discrete symmetry S(2)×S(2) toward the democratic mass matrix. Then, we show that there results an approximate Peccei-Quinn symmetry and hence the value μ is related to the axion decay constant.
我们证明了在超对称理论中，层次上很小的μ项是两个相同的 Higgs 二重态对其质量矩阵采取民主形式的结果。我们简要讨论了民主质量矩阵的离散对称性 S(2)×S(2)。然后，我们表明，这会导致一个近似的 Peccei-Quinn 对称性，因此μ值与轴子衰变常数有关。
