论文标题
用$ U（1）$ DARK SECTOR解释$ W $ BOSON质量异常和暗物质
Explaining the $W$ boson mass anomaly and dark matter with a $U(1)$ dark sector
论文作者
论文摘要
CDF合作最近报告的$ W $ BOSON质量显示，与标准模型预测的偏差为7σ$级别。我们研究了标准模型的两个简单扩展，并使用额外的$ U（1）$ Dark Sector。一个是$ u（1）_x $扩展名，其中$ u（1）_x $ gauge字段通过量规动力学术语与标准模型混合。另一个是常规$ u（1）_ {\ MathBf {a} y+\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \} q} $扩展标准模型的扩展。适合各种实验约束，我们发现只有动力学混合的$ u（1）_x $扩展名最多可以增强$ w $玻色子质量的最多10〜MEV。 While the $U(1)_{\mathbf{A} Y+\mathbf{B} q}$ extension can easily generate 77~MeV enhancement of the $W$ boson mass and also offer a viable dark matter candidate with mass ranging from several hundred GeV to TeV, which may be detected by future dark matter direct detection experiments with improved sensitivities.
The $W$ boson mass recently reported by the CDF collaboration shows a deviation from the standard model prediction with an excess at $7σ$ level. We investigate two simple extensions of the standard model with an extra $U(1)$ dark sector. One is the $U(1)_x$ extension, where the $U(1)_x$ gauge field mixes with the standard model through gauge kinetic terms. The other is a general $U(1)_{\mathbf{A} Y+\mathbf{B} q}$ extension of the standard model. Fitting various experimental constraints we find the $U(1)_x$ extension with only kinetic mixing can enhance the $W$ boson mass for at most 10~MeV. While the $U(1)_{\mathbf{A} Y+\mathbf{B} q}$ extension can easily generate 77~MeV enhancement of the $W$ boson mass and also offer a viable dark matter candidate with mass ranging from several hundred GeV to TeV, which may be detected by future dark matter direct detection experiments with improved sensitivities.
