无质量和轻Yukawaons可以无害吗？
Can Massless and Light Yukawaons be Harmless?
摘要：
在Yukawaon模型中，有效Yukawa耦合常数Y_f^{eff}（f=e，v，u，d）由具有3个\times 3分量的规范单重标量（Yukawaons）Y_f的真空期望值（VEV）给出，即Y_f^{eff}= y_f< Y_f>/Λ，无质量（轻）标量的出现是因为假设了整体味对称性。为了证明在汤川模型中这种无质量标量是否无害，作为一个例子，在带电轻子扇区中明确估计了汤川质量。
英文摘要：
In the so-called yukawaon model, where the effective Yukawa coupling constants Y_f^{eff} (f=e,ν,u,d) are given by vacuum expectation values (VEVs) of gauge singlet scalars (yukawaons) Y_f with 3\times 3 components, i.e. Y_f^{eff}= y_f < Y_f>/Λ, massless (and light) scalars appear because a global flavor symmetry is assumed. In order to demonstrate whether such massless scalars in the yukawaon model are harmless or not, yukawaon masses are explicitly estimated, as an example, in the charged lepton sector.
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