标量暗力对地球实验的影响
Implications of a Scalar Dark Force for Terrestrial Experiments
摘要：
暗物质粒子间的长程弱等效原理（WEP）破坏力是由超轻标量介导的，它受到星系动力学和大尺度结构形成的严格约束。我们研究这样一个“黑暗力量”的影响，几个地面实验，包括Eotvos测试的WEP，直接检测DM搜索，和对撞机研究。暗力的存在意味着Eotvos测试中的非消失效应，可以通过当前和未来的实验来探测，这取决于DM模型。对于标量单重DM的情况下，天体物理相关的幅度的暗力量被排除在大区域的参数空间的DM遗迹密度和WEP的限制。WEP测试也意味着对希格斯交换贡献的自旋无关（SI）DM核直接检测截面的限制。对于WIMP的情况下，这些考虑限制希格斯交换贡献的SI截面是subleading相比，规范玻色子介导的贡献。在多组分DM的情况下，暗力会阻止希格斯粒子衰变到与DM多重态环相关的两个光子的速率发生大的变化，否则可能会导致LHC或未来的线性对撞机出现可测量的偏差。银河系动力学、大尺度结构形成、Eotvos实验、DM直接探测实验和对撞机的观测组合可以进一步限制暗区新的长距离力的大小。
英文摘要：
A long range Weak Equivalence Principle (WEP) violating force between Dark Matter (DM) particles, mediated by an ultralight scalar, is tightly constrained by galactic dynamics and large scale structure formation. We examine the implications of such a "dark force" for several terrestrial experiments, including Eotvos tests of the WEP, direct-detection DM searches, and collider studies. The presence of a dark force implies a non-vanishing effect in Eotvos tests that could be probed by current and future experiments depending on the DM model. For scalar singlet DM scenarios, a dark force of astrophysically relevant magnitude is ruled out in large regions of parameter space by the DM relic density and WEP constraints. WEP tests also imply constraints on the Higgs-exchange contributions to the spin-independent (SI) DM-nucleus direct detection cross-section. For WIMP scenarios, these considerations constrain Higgs-exchange contributions to the SI cross-section to be subleading compared to gauge-boson mediated contributions. In multicomponent DM scenarios, a dark force would preclude large shifts in the rate for Higgs decay to two photons associated with DM-multiplet loops that might otherwise lead to measurable deviations at the LHC or a future linear collider. The combination of observations from galactic dynamics, large scale structure formation, Eotvos experiments, DM-direct-detection experiments, and colliders can further constrain the size of new long range forces in the dark sector.
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