标题： 单态-双重态费米型暗物质在重子规范理论中 显示英文标题

标题： Singlet-Doublet Fermionic Dark Matter in Gauge Theory of Baryons

摘要： 我们正在考虑通过将重子数作为局部规范对称性来扩展标准模型（SM）的最小$U(1)_B$模型，以容纳一个稳定的暗物质（DM）候选者。 重子的规范理论导致了非平凡的三角形规范反常，我们通过添加三个奇异费米子提供了一个简单的无反常解。 一个标量$S$自发地打破$U(1)_B$对称性，留下一个离散的$Z_2$对称性，该对称性确保了最初用于抵消三角形规范反常的最轻奇异费米子的稳定性。 具有非零超荷的弱相互作用暗物质候选者通常会受到实验上对暗物质自旋无关直接探测（SIDD）截面的严格限制。 在本工作中，我们考虑了一个两组分单态-双重态费米子暗物质场景，这显著放松了对暗物质 SIDD 截面限制的约束，尤其是在单态-双重态混合被抑制的情况下。 我们表明，该模型为一个宇宙学一致的暗物质候选者提供了可行的参数空间，该候选者可以通过直接和间接搜索、对撞机实验以及引力波（GW）实验进行探测。 显示英文摘要

摘要： We are considering a minimal $U(1)_B$ extension of the Standard Model (SM) by promoting the baryon number as a local gauge symmetry to accommodate a stable dark matter (DM) candidate. The gauge theory of baryons induces non-trivial triangle gauge anomalies, and we provide a simple anomaly-free solution by adding three exotic fermions. A scalar $S$ spontaneously breaks the $U(1)_B$ symmetry, leaving behind a discrete $Z_2$ symmetry that ensures the stability of the lightest exotic fermion was originally introduced to cancel the triangle gauge anomalies. Scenarios with weakly interacting DM candidates having non-zero hypercharge usually face stringent constraints from experimental bounds on the DM spin-independent direct-detection (SIDD) cross-section. In this work, we consider a two-component singlet-doublet fermionic dark matter scenario, which significantly relaxes the constraints from bounds on the DM SIDD cross-section for suppressed singlet-doublet mixing. We show that the model offers a viable parameter space for a cosmologically consistent DM candidate that can be probed through direct and indirect searches, collider experiments, and gravitational wave (GW) experiments.