论文标题
逃离T参数溶液到W质量异常
Running away from the T-parameter solution to the W mass anomaly
论文作者
论文摘要
我们表明，要在匹配量表下确定与CDF W-MASS异常一致的SMEFT参数空间的重量量法化组（RG）效应至关重要。这是因为仅受到弱约束的运算符 - 由Diboson和Higgs Data探测的实例 - can通过单环RG效应对W-Boson质量有贡献，这与与Electroweak Pecision Pecision Pecision观察者相关的受限制性运算符的树级贡献相当。我们将RG进化为与匹配量表一致的低能SMEFT参数空间，并找到更大的允许区域。特别是我们发现，在匹配量表上有可能消失甚至负t参数。希望这将导致更大的紫外线完成，可以解释异常。为了使一环的贡献至关重要，需要在800 GEV附近进行相对较低的新物理量表。这增加了在最近的未来直接和间接搜索中探索这种新物理学的可能性。
We show that it is essential to include renormalisation group (RG) effects for determining the SMEFT parameter space consistent with the CDF W-mass anomaly at the matching scale. This is because operators that are only weakly constrained--for instance those probed by diboson and Higgs data--can have a contribution to the W-boson mass via one-loop RG effects, that is comparable to the tree-level contribution of the much more strongly constrained operators related to electroweak precision observables. We RG evolve the low energy SMEFT parameter space consistent with the anomaly to the matching scale and find a much larger allowed region. In particular we find that it is possible to have a vanishing or even negative T -parameter at the matching scale. This will hopefully lead to a larger set of UV completions that can explain the anomaly. For the one-loop contributions to be important a relatively low new physics scale around 800 GeV is required. This enhances the possibility of probing this new physics in direct and indirect searches in the recent future.
