论文标题
NMSSM中的当前界限和未来的光中性侵蚀前景
Current bounds and future prospects of light neutralino dark matter in NMSSM
论文作者
论文摘要
与最小的对应物不同，最小的超对称标准模型（NMSSM）允许最轻的中性诺的质量可能很小至$ \ sim 1 {\ rm Gev} $，同时仍然提供了重大的Relic Dark Matter（DM）。这样的中inino也可以为希格斯提供无形的衰减模式。此外，观察到的类似Sm的Higgs Boson（$ H_ {125} $）也可能具有一个隐形的分支分数，高达$ \ sim 19 \％$。在这些事实的带领下，我们首先用光中性诺（$ m _ {{{\tildeχ} _ {1}^{0}^{0}} <62.5 {\ rm gev} $划定了较小的中性密度相关密度，并产生了较小的coldibles comptation complible compligation colligation colligation colligation colligation colligation colligation colligation comptation，我们首先将NMSSM的参数空间区域（$ m _ {{{\tildeχ} _ {{\tildeχ} _ {1}^{0}^{0}搜索，搜索暗物质以及来自风味的物理学。 We then examine the prospects for probing the NMSSM with a light neutralino via direct DM detection searches, via invisible Higgs boson width experiments at future $e^+e^-$ colliders, via searches for a light singlet Higgs boson in $2b2μ$, $2b2τ$ and $2\mu2τ$ channels and via pair production of winos or doublet higgsinos at高光度LHC及其提议的能量升级。对于最后提到的电动搜索，我们执行详细的分析，以$ 3L+{\ rm e {\ rm e {\！\！\！\！\！ $ h_ {125} $ + $ {\tildeχ} _ {1}^{0} $。我们发现HL-LHC可以在每个通道中的参数空间的一部分中发现SUSY，它们几乎可以探测整个参数空间。 HE-LHC基本上探测了整个区域的Higgsinos（Winos）比1 TEV（2 TEV）轻，而与中性衰变的方式无关，并导致明显更大的信号速率。
Unlike its minimal counterpart, the Next to Minimal supersymmetric Standard Model (NMSSM) allows the possibility that the lightest neutralino could have a mass as small as $\sim 1 {\rm GeV}$ while still providing a significant component of relic dark matter (DM). Such a neutralino can provide an invisible decay mode to the Higgs as well. Further, the observed SM-like Higgs boson ($H_{125}$) could also have an invisible branching fraction as high as $\sim 19\%$. Led by these facts, we first delineate the region of parameter space of the NMSSM with a light neutralino ($M_{{\tildeχ}_{1}^{0}} < 62.5 {\rm GeV}$) that yields a thermal neutralino relic density smaller than the measured relic density of cold dark matter, and is also compatible with constraints from collider searches, searches for dark matter, and from flavor physics. We then examine the prospects for probing the NMSSM with a light neutralino via direct DM detection searches, via invisible Higgs boson width experiments at future $e^+e^-$ colliders, via searches for a light singlet Higgs boson in $2b2μ$, $2b2τ$ and $2\mu2τ$ channels and via pair production of winos or doublet higgsinos at the high luminosity LHC and its proposed energy upgrade. For this last-mentioned electroweakino search, we perform a detailed analysis to map out the projected reach in the $3l+{\rm E{\!\!\!/}_T}$ channel, assuming that chargino decays to $W {\tildeχ}_{1}^{0}$ and the neutralino(s) decay to $Z$ or $H_{125}$ + ${\tildeχ}_{1}^{0}$. We find that the HL-LHC can discover SUSY in just part of the parameter space in each of these channels, which together can probe almost the entire parameter space. The HE-LHC probes essentially the entire region with higgsinos (winos) lighter than 1 TeV (2 TeV) independently of how the neutralinos decay, and leads to significantly larger signal rates.
