SMEFT analysis of mW
SMEFT analysis of mW
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DOI：
10.1007/jhep08(2022)308
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发表时间：
2022-04
影响因子：
5.4
通讯作者：
E. Bagnaschi;J. Ellis;Maeve Madigan;K. Mimasu;V. Sanz;T. You
中科院分区：
文献类型：
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作者：
E. Bagnaschi;J. Ellis;Maeve Madigan;K. Mimasu;V. Sanz;T. You
我们使用Fitmaker工具将最近的CDF测量结果与标准模型有效场论（SMEFT）中的电弱、希格斯和二色子数据进行全局拟合，包括线性顺序的6维算子。我们发现，在SMEFT算子shwb、HD、h_r和h_r中任意一个具有非零系数的算子都能提供比标准模型更好的拟合，对h_r有最强的牵引力，对其他电弱精度数据没有张力。然后，我们分析了标准模型的哪些树级单场扩展可以产生具有适当符号的算子系数，并讨论了最适合CDF测量和其他数据的这些场的质量和耦合。特别是，全局拟合倾向于单线态Z’矢量玻色子，零超荷的标量电弱三重态，或单位超荷的矢量电弱三重态，后面跟着单线态重中性轻子，它们的质量都在单位耦合的多tev范围内。
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 operatorsHWB,HD,ℓℓ orwith a non-zero coefficient could provide a better fit than the Standard Model, with the strongest pull forHD 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′ 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.