标题： 与95 GeV双光子过剩相矛盾的轻暗物质 显示英文标题

标题： Light dark matter confronted with the 95 GeV diphoton excess

摘要： 希格斯样标量与轻暗物质之间的相关性是一个有趣的话题，尤其是在发现了一个$125 GeV$希格斯粒子，并且暗物质（DM）搜索得到了负面结果的情况下。 最近，CMS合作组报告了使用$132 fb^{-1}$数据的$95 GeV$超额现象，以及XENONnT和LZ合作组的暗物质搜索结果促使我们重新审视这一点。 在本工作中，我们在GUT尺度约束（GUTc）的次最小超对称模型（NMSSM）中进行研究，其中大多数参数在GUT尺度输入，但标量和胶子微子质量在那里并不统一。 在计算中，我们还考虑了其他最近的实验限制，例如希格斯数据、超对称（SUSY）搜索、暗物质剩余密度等。 经过详细分析和讨论，我们发现：(i) 轻暗物质可以是纯子或单态子主导的，但可以与少量希格斯子成分混合。 (ii) 通过调整无量纲参数$\lambda, \kappa$或适当与希格斯子混合，这两种情况都可以获得正确的剩余密度和显著的希格斯不可见衰变。 (iii) 这两种情况都可以有四种漏斗湮灭机制，即通过$Z, a_1, h_2, h_1$湮灭。 (iv) 具有正确剩余密度的样本通常在未来轻子对撞机上会得到较弱的希格斯不可见衰变信号，但$95 GeV$标量可能具有显著的$b\bar{b}$信号。 显示英文摘要

摘要： The correlation between Higgs-like scalars and light dark matter is an interesting topic, especially now that a $125 GeV$ Higgs was discovered and dark matter (DM) searches got negative results. The $95 GeV$ excess reported by the CMS collaboration with $132 fb^{-1}$ data recently, and the DM search results by XENONnT and LZ collaborations motivate us to revise that. In this work, we study that in the GUT-scale constrained (GUTc) Next-to-Minimal Supersymmetric Model (NMSSM), where most parameters are input at the GUT scale, but with scalar and gaugino masses not unified there. In the calculation we also consider other recent experimental constraints, such as Higgs data, Supersymmetry (SUSY) searches, DM relic density, etc. After detailed analysis and discussion, we find that: (i) The light DM can be bino- or singlino-dominated, but can be mixed with minor components of Higgsino. (ii) Both cases can get right relic density and sizable Higgs invisible decay, by adjusting the dimensionless parameters $\lambda, \kappa$, or suitably mixing with Higgsino. (iii) Both cases can have four funnel annihilation mechanisms, i.e., annihilating through $Z, a_1, h_2, h_1$. (iv) Samples with right relic density usually get weak signal of Higgs invisible decay at future lepton collider, but the $95 GeV$ scalar can have sizable $b\bar{b}$ signal.