论文标题
标准模型中质子稳定性的注释
A Note on Proton Stability in the Standard Model
论文作者
论文摘要
在此简短说明中，我们描述了负责标准模型中绝对非扰动质子稳定性的对称性。 The SM with $N_c$ colors and ${N_g}$ generations has an exact, anomaly-free, generation-independent, global symmetry group $U(1)_{B-N_c L} \times \mathbb{Z}_{N_g}^L$, which contains a subgroup of baryon plus lepton number of order $2 N_c {N_g}$.这将质子衰减不适合$ {n_g}> 1 $。超越SM的许多经过良好研究的模型明确打破了这种全球对称性，替代性值得进一步关注。
In this short note we describe the symmetry responsible for absolute, nonperturbative proton stability in the Standard Model. The SM with $N_c$ colors and ${N_g}$ generations has an exact, anomaly-free, generation-independent, global symmetry group $U(1)_{B-N_c L} \times \mathbb{Z}_{N_g}^L$, which contains a subgroup of baryon plus lepton number of order $2 N_c {N_g}$. This disallows proton decay for ${N_g}>1$. Many well-studied models beyond the SM explicitly break this global symmetry, and the alternative deserves further attention.
