论文标题
仔细观察CP侵略性Higgs门户暗物质作为GCE的候选人
A Closer Look at CP-Violating Higgs Portal Dark Matter as a Candidate for the GCE
论文作者
论文摘要
在过去的十年中，据报道，在银河系中心有统计学意义的伽马射线过量。大型局部暗物质密度表明，这种银河中心过量（GCE）可能归因于新物理学，实际上已经表明，该信号被歼灭良好地构成了$ b \ bar {b} $，并带有w imp尺度横截面。在本文中，我们将Majorana暗物质通过HIGGS门户歼灭是该信号的候选来源，在此信号中，Higgs耦合中的大量CP侵略可能会严重抑制散射率。特别是，我们探讨了两个最小紫外线完成，单型二键模型和Doublet-Triplet模型的现象学，并绘制可在尊重当前实验约束的同时提供可行信号的可用参数空间。
A statistically significant excess of gamma rays has been reported and robustly confirmed in the Galactic Center over the past decade. Large local dark matter densities suggest that this Galactic Center Excess (GCE) may be attributable to new physics, and indeed it has been shown that this signal is well-modelled by annihilations dominantly into $b\bar{b}$ with a WIMP-scale cross section. In this paper, we consider Majorana dark matter annihilating through a Higgs portal as a candidate source for this signal, where a large CP-violation in the Higgs coupling may serve to severely suppress scattering rates. In particular, we explore the phenomenology of two minimal UV completions, a singlet-doublet model and a doublet-triplet model, and map out the available parameter space which can give a viable signal while respecting current experimental constraints.
