Combined constraints on dark photons and discovery prospects at the LHC and the Forward Physics Facility
Combined constraints on dark photons and discovery prospects at the LHC and the Forward Physics Facility
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DOI：
10.1007/jhep03(2023)182
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发表时间：
2022-12
影响因子：
5.4
通讯作者：
A. Aboubrahim;M. Altakach;M. Klasen;P. Nath;Zhu-Yao Wang
中科院分区：
文献类型：
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作者：
A. Aboubrahim;M. Altakach;M. Klasen;P. Nath;Zhu-Yao Wang
隐藏扇区在超引力理论、弦和膜中无处不在。诸如斯图克尔伯格隐藏扇形模型等动机良好的模型可以为暗物质提供候选者。在此类模型中，隐藏部分通过暗光子（暗 Z'）的交换与可见部分进行通信，而暗物质则由隐藏部分中的狄拉克费米子构成。利用对撞机搜索和 SM 过程的精确测量的数据以及暗物质直接和间接探测实验的最新限制，我们对 Z′ 质量的大范围进行了全面扫描，并在从亚 GeV 到几个 TeV 的参数空间上设置了排除界限。然后，我们讨论了 HL-LHC 上 (TeV) 尺度 Z' 的发现潜力，以及未来前向探测器探测相互作用非常弱的亚 GeV Z' 玻色子的能力。我们的分析表明，Z' 可以衰变为隐藏扇形暗物质的参数空间受到严格限制，而对于没有暗衰变的 Z' 来说，限制变得更弱。该分析还支持自热化暗区，这是满足暗物质遗迹密度所必需的。
Hidden sectors are ubiquitous in supergravity theories, in strings and in branes. Well motivated models such as the Stueckelberg hidden sector model could provide a candidate for dark matter. In such models, the hidden sector communicates with the visible sector via the exchange of a dark photon (dark Z′) while dark matter is constituted of Dirac fermions in the hidden sector. Using data from collider searches and precision measurements of SM processes as well as the most recent limits from dark matter direct and indirect detection experiments, we perform a comprehensive scan over a wide range of the Z′ mass and set exclusion bounds on the parameter space from sub-GeV to several TeV. We then discuss the discovery potential of an(TeV) scale Z′ at HL-LHC and the ability of future forward detectors to probe very weakly interacting sub-GeV Z′ bosons. Our analysis shows that the parameter space in which a Z′ can decay to hidden sector dark matter is severely constrained whereas limits become much weaker for a Z′ with no dark decays. The analysis also favors a self-thermalized dark sector which is necessary to satisfy the dark matter relic density.