论文标题
$ M_ {W} $的SMEFT分析
SMEFT Analysis of $m_{W}$
论文作者
论文摘要
我们使用FitMaker工具将$ M_W $的最新CDF测量在全球符合Electroweak，Higgs和Diboson数据中的全球拟合中，并在标准模型有效场理论（SMEFT）中，包括以线性顺序的尺寸-6运算符。我们发现，包括任何一个smeft操作员$ {\ cal o} _ {hwb} $，$ {\ cal o} _ {hd} $，$ {\ cal o} _ {\ cal o} _ {\ ell \ ell \ ell \ ell \ ell \ ell} $或$ {\ cal o} _ {\ cal o} _ {标准模型，具有最强的拉力，以$ {\ cal o} _ {hd} $，并且没有其他electroweak精密数据的张力。然后，我们分析标准模型的树级单场扩展可以使用适当的符号生成此类操作员系数，并讨论这些磁场的质量和耦合，这些磁场最适合CDF测量和其他数据。尤其是，全球拟合人士偏爱单元$ z^\ prime $ vector玻色子，标量元件的静电三重态，或带有单位高充值的矢量electeroweak三重态，然后是单身重型中性麻勒顿，所有质量都具有单位coupling的多型TEEV范围。
We use the Fitmaker tool to incorporate the recent CDF measurement of $m_W$ in a global fit to electroweak, Higgs, and diboson data in the Standard Model Effective Field Theory (SMEFT) including dimension-6 operators at linear order. We find that including any one of the SMEFT operators ${\cal O}_{HWB}$, ${\cal O}_{HD}$, ${\cal O}_{\ell \ell}$ or ${\cal O}_{H \ell}^{(3)}$ with a non-zero coefficient could provide a better fit than the Standard Model, with the strongest pull for ${\cal O}_{HD}$ and no tension with other electroweak precision data. We then analyse which tree-level single-field extensions of the Standard Model could generate such operator coefficients with the appropriate sign, and discuss the masses and couplings of these fields that best fit the CDF measurement and other data. In particular, the global fit favours either a singlet $Z^\prime$ vector boson, a scalar electroweak triplet with zero hypercharge, or a vector electroweak triplet with unit hypercharge, followed by a singlet heavy neutral lepton, all with masses in the multi-TeV range for unit coupling.
