物质粒子代数目N_G的起源

Investigation of the number N_G of matter particle generations

在基本粒子物理的标准模型中,代数目的起源一直是悬而未决的问题.概述标准模型中3代费米子的确定以及代的物理背景,并讨论了利用规范反常消除条件在超对称大统一框架下探究代数目的可能性.超对称模型中的代数目依赖于大统一框架中的群结构.

In the standard model of particle physics,there are three generations of matter particles with identical quantum numbers but distinct masses. However,neither the answer to the question of whether there are only three generations of matter particles nor the origin of generation number is clear. We introduce the determination of three generations in the standard model and its physical background,and discuss the possibility of investigating the generation number in the supersymmetric grand unification framework. The generation number in the supersymmetric models depends on the grand unification group structure.