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arXiv 2204.04710hep-ph
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SUSY的LHC探针和$(g-2)_μ$的近期测量对$\mathbb{Z}_3$ - NMSSM的影响

Impact of LHC probes of SUSY and recent measurement of $(g-2)_μ$ on $\mathbb{Z}_3$-NMSSM

Junjie Cao, Fei Li, Jingwei Lian, Yusi Pan, Di Zhang

摘要:

众所周知,超重的超对称粒子(sparticle)不适合解释$(g-2)_μ$异常,但有些人忽略了中等重量的sparticle也不适合LHC的超对称探测。我们以次最小超对称标准模型为例来强调后一点。研究发现,如果理论要在$2σ$水平上解释反常现象,同时又与LHC结果保持一致,则可以设定如下下界:$\tan β\gtrsim 20$、$|M_1| \gtrsim 275~{\rm GeV}$、$M_2 \gtrsim 300~{\rm GeV}$、$μ\gtrsim 460~{\rm GeV}$、$m_{\tildeμ_L} \gtrsim 310~{\rm GeV}$和$m_{\tildeμ_R} \gtrsim 350~{\rm GeV}$,其中$M_1$和$M_2$表示Gaugino质量,$μ$表示Higgsino质量,$m_{\tildeμ_L}$和$m_{\tildeμ_R}$是Smuons的质量,$L$和$R$表示它们的主要手性组分。这一观测对暗物质(DM)物理学有重大影响,例如,流行的$Z$ -和Higgs-漏斗区被排除在外,Bino主导的中性伴子DM必须与Wino主导的电弱伴子(在大多数情况下)和/或Smuons(在少数情况下)共湮灭,以获得正确的密度。我们还推断,这些结论应该适用于最小超对称标准模型,因为边界的基础物理是相同的。

英文摘要:

It is well known that excessively heavy supersymmetric particles (sparticles) are disfavored to explain the $(g-2)_μ$ anomaly, but some people overlook that moderately light sparticles are also disfavored by the LHC probes of supersymmetry. We take the Next-to-Minimal Supersymmetric Standard Model as an example to emphasize the latter point. It is found that, if the theory is required to explain the anomaly at $2σ$ level and meanwhile keep consistent with the LHC results, the following lower bounds may be set: $\tan β\gtrsim 20$, $|M_1| \gtrsim 275~{\rm GeV}$, $M_2 \gtrsim 300~{\rm GeV}$, $μ\gtrsim 460~{\rm GeV}$, $m_{\tildeμ_L} \gtrsim 310~{\rm GeV}$, and $m_{\tildeμ_R} \gtrsim 350~{\rm GeV}$, where $M_1$ and $M_2$ denote gaugino masses, $μ$ represents the Higgsino mass, and $m_{\tildeμ_L}$ and $m_{\tildeμ_R}$ are the mass of Smuons with $L$ and $R$ denoting their dominant chiral component. This observation has significant impacts on dark matter (DM) physics, e.g., the popular $Z$- and Higgs-funnel regions have been excluded, and the Bino-dominated neutralino DM has to co-annihilate with the Wino-dominated electroweakinos (in most cases) and/or Smuons (in few cases) to obtain the correct density. It is also inferred that these conclusions should apply to the Minimal Supersymmetric Standard Model since the underlying physics for the bounds are the same.

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