论文标题
新的“ Muon G-2”结果和$ W $ -BOSON质量的相互依存关系
Interdependence of the new "MUON G-2" Result and the $W$-Boson Mass
论文作者
论文摘要
假设最轻的中性诺作为暗物质（DM）候选者，标准模型（MSSM）的最小超对称扩展的电动扇区可以解释各种实验结果。特别地，它可以解释MUON异常磁矩，$（G-2）_ $的实验结果与其标准模型（SM）预测之间的差异。新的“ MUON G-2”结果与较旧的BNL相结合$（G-2）_μ$，与SM预测$ΔA_μ=（25.1 \ PM 5.9）\ Times 10^{ - 10} $相对于SM预测的偏差，相当于$ 4.2〜σ $。使用此更新的绑定，以及其他约束，我们计算了$ W $ Boson质量的MSSM预测，$ M_W $。我们只假设来自EW部门的贡献，而MSSM的彩色部门被认为是沉重的。我们研究了五个方案，这些方案以与最新的普朗克边界一致的机制而区别。我们发现，考虑到新的$（g-2）_ $结果，并根据场景的不同，最高$ m_w^{\ mathrm {mssm}}} \ sillesim 80.376〜 \ mathrm {gev} $。对于Wino DM获得了最大的值，对于Slepton共同宣布，在$ 1 \ 1 \，σ$范围内，实验性世界平均值为$ M_W^{\ Mathrm {exp}} = 80.379 \ 80.379 \ pm 〜0.012〜0.012〜0.012〜 \ mathrm {geev} $ M_W^{\ MATHRM {SM}} = 80.353〜 \ MATHRM {GEV} $。我们分析了$ m_w^{\ mathrm {mssm}} $在EW SuperPartners的相关质量上的依赖性，并证明未来的$ M_W $测量值，例如。在ILC，可以区分各种MSSM实现。 $ M_W^{\ Mathrm {MSSM}} $的可观贡献与相对较轻的$ \tildeχ^0_1 $相关联，伴随着浅色chargino或浅色Smuon，为未来的碰撞搜索设定了有趣的目标。
The electroweak (EW) sector of the Minimal Supersymmetric extension of the Standard Model (MSSM), assuming the lightest neutralino as Dark Matter (DM) candidate, can account for a variety of experimental results. In particular it can account for the discrepancy between the experimental result for the anomalous magnetic moment of the muon, $(g-2)_μ$, and its Standard Model (SM) prediction. The new "MUON G-2" result, combined with the older BNL result on $(g-2)_μ$, yields a deviation from the SM prediction of $Δa_μ = (25.1 \pm 5.9) \times 10^{-10}$, corresponding to $4.2~σ$. Using this updated bound, together with the other constraints, we calculate the MSSM prediction for the mass of the $W$ boson, $M_W$. We assume contributions only from the EW sector, with the colored sector of the MSSM taken to be heavy. We investigate five scenarios, distinguished by the mechanisms which yield a relic DM density in agreement with the latest Planck bounds. We find that with the new $(g-2)_μ$ result taken into account and depending on the scenario, values up to $M_W^{\mathrm{MSSM}} \lesssim 80.376~\mathrm{GeV}$ are reached. The largest values are obtained for wino DM and in the case of slepton co-annihilation, where points well within the $1\,σ$ range of the experimental world average of $M_W^{\mathrm{exp}} = 80.379 \pm~0.012~\mathrm{GeV}$ are reached, whereas the SM predicts a too small value of $M_W^{\mathrm{SM}} = 80.353~\mathrm{GeV}$. We analyze the dependence of $M_W^{\mathrm{MSSM}}$ on the relevant masses of the EW superpartners and demonstrate that future $M_W$ measurements, e.g. at the ILC, could distinguish between various MSSM realizations. Sizable contributions to $M_W^{\mathrm{MSSM}}$ are associated with a relatively light $\tildeχ^0_1$, accompanied by either a light chargino or a light smuon, setting interesting targets for future collider searches.
