论文标题
部分可观测时空混沌系统的无模型预测
Dark matter in the NMSSM with small $λ$ and $κ$
论文作者
论文摘要
NMSSM提供了出色的暗物质候选者，通常是宇宙中最轻的超对称粒子（LSP）的最轻的中性诺（$ \tildeχ^0_1 $）。它是Bino，中性Wino，中性的Higgsinos和Singlino的混合物。在这项工作中，考虑到理论和实验性约束，包括$λ$和$κ$，我们研究了最轻的中性诺的特征，包括$λ$和$κ$，包括$λ$和$κ$。我们发现，对于所选场景的大多数样本点，LSP暗物质是一个以单杆为主的中性诺。因此，与期望相反，NMSSM在暗物质属性方面与MSSM不可媲美，因为$λ$和$κ$很小。在某些参数空间中，LSP也可以是higgsino主导的或以比诺为主的为主。影响LSP质量和特性的最重要参数是$κ$，$λ/κ$和$μ_{\ rm eff} $。此外，我们注意到$σ^{si} _p \大约1.02 $ $σ^{si} _n $和$σ^{sd} _p \大约0.76 $ $ $σ^{sd} _n $对于所有存活的样品。
The NMSSM provides an excellent dark matter candidate, usually, the lightest neutralino ($\tildeχ^0_1$) being the lightest supersymmetric particle (LSP), in the universe. It is a mixture of the bino, the neutral wino, the neutral higgsinos, and the singlino. In this work, we investigate the features of the lightest neutralino by concentrating on a specific region of the NMSSM parameter space with small values of both $λ$ and $κ$, taking into account theoretical and experimental constraints, including relic density, direct and indirect detection constraints. We have found that the LSP dark matter is a singlino-dominated neutralino for most of the sample points of the chosen scenario. Thus, contrary to expectations, the NMSSM is not comparable to the MSSM in terms of dark matter properties as $λ$ and $κ$ are very small. The LSP can also be either higgsino-dominated or bino-dominated in some parameter space. The most important parameters affecting the mass and properties of the LSP are $κ$, $λ/κ$, and $μ_{\rm eff}$. Further, we notice that $σ^{SI}_p \approx 1.02$ $σ^{SI}_n$ and $σ^{SD}_p \approx 0.76$ $σ^{SD}_n$ for all the surviving sample points.
