Fan Yi-Zhong, Tang Tian-Peng, Tsai Yue-Lin Sming, Wu Lei
Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033, China.
School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui 230026, China.
Phys Rev Lett. 2022 Aug 26;129(9):091802. doi: 10.1103/PhysRevLett.129.091802.
The W-boson mass, which was recently measured at Fermilab with an unprecedented precision, suggests the presence of new multiplets beyond the standard model (SM). One of the minimal extensions of the SM is to introduce an additional scalar doublet in which the non-SM scalars can enhance W-boson mass via the loop corrections. On the other hand, with a proper discrete symmetry, the lightest new scalar in the doublet can be stable and play the role of a dark matter particle. We show that the inert two Higgs doublet model can naturally handle the new W-boson mass without violating other constraints and that the preferred dark matter mass is between 54 and 74 GeV. We identify three feasible parameter regions for the thermal relic density: the SA coannihilation, the Higgs resonance, and the SS→WW^{*} annihilation. We find that the first region can be fully tested by the High Luminosity Large Hadron Collider, the second region will be tightly constrained by direct detection experiments, and the third region could yield detectable GeV γ-ray and antiproton signals in the Galaxy that may have been observed by the Fermi Large Area Telescope and the Alpha Magnetic Spectrometer AMS-02 experiment.
W玻色子质量最近在费米实验室以空前的精度被测量，这表明存在超出标准模型（SM）的新多重态。标准模型的最小扩展之一是引入一个额外的标量二重态，其中非标准模型标量可以通过圈修正来提高W玻色子质量。另一方面，通过适当的离散对称性，二重态中最轻的新标量可以是稳定的，并起到暗物质粒子的作用。我们表明，惰性双希格斯二重态模型可以自然地处理新的W玻色子质量而不违反其他限制，并且首选的暗物质质量在54至74 GeV之间。我们确定了热遗迹密度的三个可行参数区域：SA共湮灭、希格斯共振和SS→WW*湮灭。我们发现，第一个区域可以通过高亮度大型强子对撞机进行全面测试，第二个区域将受到直接探测实验的严格限制，第三个区域可能在银河系中产生可探测的GeV伽马射线和反质子信号，费米大面积望远镜和阿尔法磁谱仪AMS-02实验可能已经观测到这些信号。
