论文标题
$ e^-e^+\ in $ e^-e^+\ to w^-w^+$在$ \ sqrt {s} = 250 $ gev探测异常$ w^-w^+z/γ$ couplings
Role of polarizations and spin-spin correlations of $W's$ in $e^-e^+ \to W^-W^+$ at $\sqrt{s} = 250$ GeV to probe anomalous $W^-W^+Z/γ$ couplings
论文作者
论文摘要
我们研究异常$ W^-W^+Z/γ$耦合，这是由于尺寸 - $ 6 $运算符在生产过程中的运算符$ e^-e^+\ to w^-w^+$，然后使用偏振和使用$ W $ bosons的偏振和旋转旋转相关性进行半leptonic衰减。一些极化和自旋旋转相关性不对称的构建需要一个区分来自$ w^+$衰减的两个衰减夸克。我们开发了一个人工神经网络（ANN）和一个增强的决策树（BDT），以区分向上的喷气机与上的喷气机，并用它们在国际线性碰撞器（ILC）上以$ \ sqrt {s} = 250 $ GEV的限制在国际线性碰撞器（ILC）上对100 $ $ $ $ $ \ MANTIS进行了限制。 \ text {fb}^{ - 1}，\ 250 \ \ text {fb}^{ - 1}，\ 1000 \ \ \ \ text {fb}^{ - 1}，\ 3000 \ \ text {fb}我们发现，与较早的研究相比，在横截面之上的极化和自旋相关可观察物的使用显着提高了异常耦合的限制。
We study anomalous $W^-W^+Z/γ$ couplings due to dimension-$6$ operators in the production process $e^-e^+ \to W^-W^+$ followed by semi-leptonic decay using polarizations and spin-spin correlations of $W$ bosons. The construction of some of the polarization and spin-spin correlation asymmetries required one to distinguish between two decay quarks coming from $W^+$ decay. We developed an artificial neural network (ANN) and a boosted decision tree (BDT) to distinguish down-type jets from up-type jets and used them to put constraint on anomalous couplings at International Linear Collider (ILC) running at $\sqrt{s} = 250$ GeV with integrated luminosities of $\mathcal{L} \in \{100 \ \text{fb}^{-1}, \ 250 \ \text{fb}^{-1}, \ 1000 \ \text{fb}^{-1}, \ 3000 \ \text{fb}^{-1}\}$. We find that the use of polarization and spin correlation observables, on top of the cross-sections, significantly improves the limits on anomalous coupling compared to the earlier studies.
