论文标题
狩猎ewinos和$ z_3 $ -nmssm的轻标量，在LHC处有bino般的暗物质
Hunting ewinos and a light scalar of $Z_3$-NMSSM with a bino-like dark matter in top squark decays at the LHC
论文作者
论文摘要
我们研究了相对较轻的electroweakinos的大型强子对撞机（LHC）的前景，以及$ z_3 $ - symmetric的近代超对称标准模型（$ z_3 $ -nmmssmssmssmssmssmssmssmssmssmsss的级别）的级别（$ 1.5 $ 1.5 $ 1.5 $ 1.5 $ 1.5）哪种特征涉及单线状态。我们在一个场景中工作，最轻的（最近一至最高）的Susy粒子是Bino（Singlino），类似于100 GEV（$ \ \ gtrsim 100 $ GEV）的质量，而一对立即重的中性中性属和较轻的Chargino较轻的Chargino却是像$ \ sim 500 $ GEV的范围一样。此外，频谱中存在的单线样标量为LSP的相互灭绝提供了一个漏斗，从而使后者在其遗物丰度上遇到了实验上的上限。该方案的动机是由于它提供类似Bino的暗物质的能力，其质量与现在不利于MSSM的质量不同，同时避免了这些涉及粒子质量的LHC实验的严格下限，并且仍然保持合理的“自然”。 We find that while a usual cut-based analysis (CBA) on LHC data worth 300 $\text{fb}^{-1}$ would be unable to discover such excitations, a multivariate analysis (MVA) can be reasonably sensitive to higgsino-like electroweakinos having masses $\gtrsim 650$ GeV when the lighter top squark has a mass $\gtrsim 1$ TeV.另一方面，使用3000 $ \ text {fb}^{ - 1} $数据质量可以在CBA中访问，而即使在此类数据集上的MVA也不太可能找到这些具有1 tev的电eakinos，而当较轻的Topark的质量击中了较轻的Top squark tev $ \ sim \ sim \ sim \ sim 1.5 $ tev时。
We study the prospects of a simultaneous hunt at the Large Hadron Collider (LHC) of relatively light electroweakinos and a singlet-like scalar of the $Z_3$-symmetric Next-to-Minimal Supersymmetric Standard Model ($Z_3$-NMSSM) in the cascade decays of not so heavy ($\lesssim 1.5$ TeV) top squarks that are produced in pairs at the LHC which characteristically involve the singlet-like states. We work in a scenario where the lightest (next-to-lightest) SUSY particle is bino (singlino)-like with a mass below 100 GeV ($\gtrsim 100$ GeV), whereas a pair of immediately heavier neutralinos and the lighter chargino are higgsino-like with masses in the range $\sim 500$ GeV -- 1 TeV. Further, the singlet-like scalar present in the spectrum provides a funnel for a rapid enough mutual annihilation of the LSP thus making the latter meet the experimental upper bound on its relic abundance. The scenario is motivated by its ability to offer a bino-like dark matter with such a mass unlike what is now disfavored in the MSSM while avoiding the stringent lower bounds from the LHC experiments on the masses of these involved particles and still remaining reasonably `natural'. We find that while a usual cut-based analysis (CBA) on LHC data worth 300 $\text{fb}^{-1}$ would be unable to discover such excitations, a multivariate analysis (MVA) can be reasonably sensitive to higgsino-like electroweakinos having masses $\gtrsim 650$ GeV when the lighter top squark has a mass $\gtrsim 1$ TeV. On the other hand, with 3000 $\text{fb}^{-1}$ of data these masses become accessible in a CBA while even an MVA on such a data set is unlikely to find these electroweakinos with masses around 1 TeV when the mass of the lighter top squark hits $\sim 1.5$ TeV.
