AI 中文总结
研究在宇称对称性解决强CP问题的框架下意外稳定暗物质的可能性，利用$SU(2)_L \times SU(2)_R$双三重态费米子计算遗迹丰度并推导参数空间限制，指出对称破缺尺度要求及可探测情况。
AI 中文摘要
宇称对称性与扩展规范群$SU(3)_c \times SU(2)_L \times SU(2)_R \times U(1)_X$可解决强CP问题。特别是，标准模型希格斯的宇称伙伴打破$SU(2)_R\times U(1)_X$的模型无需引入额外对称性即可解决强CP问题。我们讨论了该框架中意外稳定暗物质的可能性，表明$SU(2)_L \times SU(2)_R$双三重态费米子在宇宙学时间尺度上可以稳定。我们计算了双三重态暗物质的遗迹丰度，并从对撞机、直接探测和间接探测实验中得出对参数空间的限制。$SU(2)_R\times U(1)_X$对称破缺尺度需低于150 TeV，且大部分参数空间可被近期间接探测实验探测到。
英文摘要
Parity symmetry, with an extended gauge group $SU(3)_c \times SU(2)_L \times SU(2)_R \times U(1)_X$, can solve the strong CP problem. In particular, the model where $SU(2)_R\times U(1)_X$ is broken by the Parity partner of the Standard Model Higgs solves the strong CP problem without the necessity of introducing extra symmetry. We discuss the possibility of accidentally stable dark matter in this framework and show that $SU(2)_L \times SU(2)_R$ bi-triplet fermions can be stable over cosmological timescales. We compute the relic abundance of the bi-triplet dark matter and derive constraints on the parameter space from collider, direct-detection, and indirect-detection experiments. The $SU(2)_R\times U(1)_X$ symmetry breaking scale is required to be below 150 TeV, and most of the parameter space can be probed by near-future indirect-detection experiments.
Comments51 pages, 6 figures
