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arXiv 1811.04435hep-phhep-ex
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μ子g-2、LHC和暗物质约束下的半约束NMSSM

The semi-constrained NMSSM in light of muon g-2, LHC, and dark matter constraints

Kun Wang, Fei Wang, Jingya Zhu, Quanlin Jie

摘要:

半约束NMSSM(scNMSSM)是对MSSM的一个单重场扩展,它要求统一夸克和slepton扇区中的超对称软破缺项,但允许Higgs扇区中的超对称软破缺项不同.在125 GeV Higgs数据、B物理、寻找低质量和高质量共振态、LHC寻找超对称粒子、WMAP/Planck寻找暗物质遗迹密度、LUX、XENON 1 T和PandaX-II直接寻找暗物质的约束下,我们尝试解释scNMSSM中的μ介子g-2。我们发现,在上述约束条件下,scNMSSM仍然可以(i)满足μ子g-2在1 $σ$水平,具有轻μ子sneutrino和轻电荷子:(ii)预测高度单重态占主导的95~GeV Higgs,具有CMS数据暗示的双光子率,因为轻Higgsino-like电荷子和中等$λ$ ;(iii)用小的$μ_{\rm eff},\, M_0,\, M_{1/2},\, {\rm and}\, A_0$从GUT标度得到低的微调,具有更轻的停止质量,可以低至约500 GeV,这可以在未来的研究中用13~TeV LHC的搜索结果进一步检验;(iv)最轻的中性伴子是单伴子或希格西诺伴子,而双伴子和维诺伴子则较重,因为在LHC上有高的胶子束缚,在GUT标度上有普适的高胶子条件;(v)满足上述所有约束,尽管最轻的中性伴子作为唯一的暗物质候选者,要获得足够的遗迹密度并不容易。探讨了提高文物密度的几种途径。

英文摘要:

The semi-constrained NMSSM (scNMSSM) extends the MSSM by a singlet field, and requires unification of the soft SUSY breaking terms in the squark and slepton sectors, while it allows that in the Higgs sector to be different. We try to interpret the muon g-2 in the scNMSSM, under the constraints of 125 GeV Higgs data, B physics, searches for low and high mass resonances, searches for SUSY particles at the LHC, dark matter relic density by WMAP/Planck, and direct searches for dark matter by LUX, XENON1T, and PandaX-II. We find that under the above constraints, the scNMSSM can still (i) satisfy muon g-2 at 1$σ$ level, with a light muon sneutrino and light chargino; (ii) predict a highly-singlet-dominated 95~GeV Higgs, with a diphoton rate as hinted at by CMS data, because of a light higgsino-like chargino and moderate $λ$; (iii) get low fine tuning from the GUT scale with small $μ_{\rm eff},\, M_0,\, M_{1/2},\, {\rm and}\, A_0$, with a lighter stop mass which can be as low as about 500 GeV, which can be further checked in future studies with search results from the 13~TeV LHC; (iv) have the lightest neutralino be singlino-dominated or higgsino-dominated, while the bino and wino are heavier because of high gluino bounds at the LHC and universal gaugino conditions at the GUT scale; (v) satisfy all the above constraints, although it is not easy for the lightest neutralino, as the only dark matter candidate, to get enough relic density. Several ways to increase relic density are discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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