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arXiv 2301.05959hep-ph
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在超对称 $U(1)_R\ imes U(1)_{B-L}$ 模型中协调对撞机信号、暗物质与缪子反常磁矩

Reconciling collider signals, dark matter, and the muon anomalous magnetic moment in the supersymmetric $ U(1)_{R}\times U(1)_{B-L}$ model

Parham Dehghani, Mariana Frank

AI总结:

该研究在 $U(1)_R\ imes U(1)_{B-L}$ 超对称模型中利用 GUT 尺度非普适边界条件,协调暗物质、LHC 对撞机信号与缪子反常磁矩等约束。

摘要:

我们研究了由 $U(1)_R\ imes U(1)_{B-L}$ 对称性扩展的超对称模型的低能预言,该模型通过左右超对称模型在 GUT 尺度破缺 $SO(10)$ 对称性而得到。两个新的单态 Higgs 场($χ_R$、$\arχ_R$)负责将 $U(1)_R\ imes U(1)_{B-L}$ 对称性破缺至标准模型规范群。我们通过假设 GUT 尺度上的普适与非普适边界条件,考察其在实现低能可观测量、暗物质实验、缪子磁矩测量以及 $Z'$ 唯象之间一致性方面的作用,从而探索该模型的唯象学。我们考察了以最轻 neutralino 和 sneutrino 质量本征态作为暗物质候选者、且满足所有实验约束的不同情形。我们探索了多种情形下的对撞机信号,包括不同基准点及其相对于标准模型背景的显著性。为补充分析,我们对若干 LHC 分析进行了重铸,以验证不同基准点的可信度。我们发现,放宽 $M_{\ m GUT}$ 处的普适性条件可显著改善模型与实验界限的符合程度。尽管缪子反常磁矩被发现是该模型最难拟合的可观测量,但借助 GUT 尺度上的非普适性,我们仍在参数空间中找到了与测量平均值相差在 $2σ$ 以内的一致点。

英文摘要:

We study the low-scale predictions of the supersymmetric model extended by $U(1)_R \times U(1)_{B-L}$ symmetry, obtained by breaking $SO(10)$ symmetry at GUT scale via a left-right supersymmetric model. Two new singlet Higgs fields ($χ_R$, $\barχ_R$) are responsible for the $U(1)_R \times U(1)_{B-L}$ symmetry breaking to the standard model gauge group. We explore the phenomenology of this model by assuming universal and non-universal boundary conditions at the GUT scale and their effects in obtaining consistency among low-energy observables, dark matter experiments, muon magnetic moment measurements, and $Z^{\prime}$ phenomenology. We examine different scenarios with both the lightest neutralino and sneutrino mass eigenstates as the dark matter candidates that satisfy all the experimental constraints. We explore the collider signals of various scenarios including different benchmarks and their significance versus standard model background. To complement our analysis, we perform recasting of several LHC analyses to verify the credibility of different benchmarks. We find that relaxing the universality conditions at $M_{\rm GUT}$ can significantly improve the agreement of the model against the experimental bounds. While the muon anomalous magnetic moment is found to be the most challenging observable to fit with the model, we find points in the parameter space consistent within $2 σ$ from the average measured value, employing non-universality at the GUT scale.

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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