大型强子对撞机对最小超对称标准模型电弱子扇区揭示了什么？
What has the LHC told us about the electroweakino sector of the Minimal Supersymmetric Standard Model?
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中文总结 AI 辅助
本文通过全局拟合LEP和LHC数据，给出MSSM电弱子质量约束，排除低质量区域，并指出无法同时解释ATLAS和CMS的超出，为迄今最全面的对撞机约束总结。
中文摘要 AI 辅助
我们利用一组全面的LEP搜索、34项Run 2 LHC搜索和63项Run 2 LHC测量，对最小超对称标准模型（MSSM）的电弱扇区进行了全局拟合。扫描bino、wino和Higgsino质量参数以及Higgs真空期望值之比，我们发现对于轻的bino \tilde{\chi}_{1}^0，次轻中性子的质量必须满足 $m_{\tilde{\chi}_{2}^0} \gtrsim 760$ GeV。虽然MSSM电弱子可以解释ATLAS和CMS在针对压缩谱的搜索中观察到的个别超出，但我们发现没有情景能同时拟合这些超出。当我们加入轻引力子时，中性子被进一步排除至约1 TeV，尽管这取决于其组成；Higgsino主导的 \tilde{\chi}_{1}^0 仅需 $m_{\tilde{\chi}_{1}^0} \approx m_{\tilde{\chi}_{2}^0} \gtrsim 650$ GeV。最后，较新的LHC搜索和测量排除了先前研究中偏好的低质量区域。这是迄今为止对MSSM电弱子扇区对撞机约束的最完整总结。
英文摘要
We perform global fits of the electroweak sector of the Minimal Supersymmetric Standard Model (MSSM) using a comprehensive set of LEP searches, 34 Run 2 LHC searches, and 63 Run 2 LHC measurements. Scanning the bino, wino and Higgsino mass parameters, and the ratio of the Higgs vacuum expectation values, we find that for a light, bino $\tildeχ_{1}^0$, the mass of the next-to-lightest neutralino must be $m_{\tildeχ_{2}^0} \gtrsim 760$ GeV. While MSSM electroweakinos can explain individual excesses observed by ATLAS and CMS in searches targeting compressed spectra, we find no scenarios that fit these excesses simultaneously. When we add a light gravitino, neutralinos are further excluded up to about 1 TeV, though this depends on their composition; Higgsino-dominated $\tildeχ_{1}^0$ requires only $m_{\tildeχ_{1}^0} \approx m_{\tildeχ_{2}^0} \gtrsim 650$ GeV. Lastly, the newer LHC searches and measurements exclude a low-mass region that was preferred in a previous study. This is the most complete summary of collider constraints on the electroweakino sector of the MSSM performed to date.
发表机构
- Nanjing Normal University（南京师范大学）
- Monash University（蒙纳士大学）
- University of Glasgow（格拉斯哥大学）
- University College London（伦敦大学学院）
- University of Oslo（奥斯陆大学）
- Xi’an Jiaotong-Liverpool University（西交利物浦大学）
- Karlsruhe Institute of Technology（卡尔斯鲁厄理工学院）
- European Organisation for the Exploitation of Meteorological Satellites（欧洲气象卫星应用组织）
- CERN（欧洲核子研究中心）
- Gridsight（网格视野）
机构由 AI 辅助整理，请以论文原文为准。
