We present a novel approach to construct a color tagger, i.e. an observable that is able to discriminate the decay of a color-singlet into two jets from a two-jet background in a different color configuration. We do this by explicitly taking the ratio of the corresponding leading-order matrix elements in the soft limit, thus obtaining an observable that is provably optimal within our approximation. We call this observable the "jet color ring" and we compare its performance to other color-sensitive observables such as jet pull and dipolarity. We also assess the performance of the jet color ring in simulations by applying it to the case of the hadronic decays of a boosted Higgs boson and of an electroweak boson.

中文翻译：

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最佳的可观察到的颜色单重态识别

我们提出了一种新颖的方法来构造颜色标记器，即一种可观察到的颜色标记器，它能够将颜色单一的衰变区分为来自具有不同颜色配置的双喷射背景的两个喷射。为此，我们明确地将相应的前导矩阵元素的比率取为软极限，从而获得在我们的近似范围内可证明是最优的可观察值。我们将这种可观察到的物体称为“喷射色环”，并将其性能与其他对颜色敏感的可观察物（例如喷射拉力和偶极性）进行比较。我们还通过将其应用于希格斯玻色子和电弱玻色子强子衰变的情况，来评估喷射色环在模拟中的性能。