使用人工神经网络提取矢量玻色子散射过程中反常 $γγ\to W^+W^-$ 散射的能量标度
Extract the energy scale of anomalous $γγ\to W^+W^-$ scattering in the vector boson scattering process using artificial neural networks
AI总结：
本文使用人工神经网络（ANN）重建大型强子对撞机VBS过程中反常$γγ\to W^+W^-$散射的能量标度，推导出含五个参数的近似公式，并利用幺正性界限截断有效抑制信号事件，评估了对反常$γγWW$耦合的敏感度与预期约束。
摘要：
作为搜索超越标准模型（SM）的新物理（NP）信号的模型无关方法，标准模型有效场论（SMEFT）近期引起了广泛关注。过程的能量标度是研究如 SMEFT 等有效场论（EFT）的重要参数。然而，对于在强子对撞机上且末态包含中微子的过程，能量标度很难重建。在本文中，我们使用人工神经网络（ANN）研究了大型强子对撞机（LHC）上矢量玻色子散射（VBS）过程 $pp\to j j \ell^+\ell^-ν\barν$ 中反常 $γγ\to W^+W^-$ 散射的能量标度。我们发现 ANN 是重建 $γγ\to W^+W^-$ 散射能量标度的强大工具。我们还研究了影响 ANN 效果的因素。此外，我们尝试解释 ANN，并得到了一个仅包含五个拟合参数的近似公式，其效果远优于由运动学分析推导出的近似。借助 ANN 方法，幺正性界限被作为对 $γγ\to W^+W^-$ 散射能量标度的截断，发现这对信号事件有显著的抑制作用。我们还研究了 $pp\to j j \ell^+\ell^-ν\barν$ 过程对反常 $γγWW$ 耦合的敏感度，以及在当前和未来可能的 LHC 上对系数的预期约束。
英文摘要：
As a model independent approach to search for the signals of new physics~(NP) beyond the Standard Model~(SM), the SM effective field theory~(SMEFT) draws a lot of attention recently. The energy scale of a process is an important parameter in the study of an EFT such as the SMEFT. However, for the processes at a hadron collider with neutrinos in the final states, the energy scales are difficult to reconstruct. In this paper, we study the energy scale of anomalous $γγ\to W^+W^-$ scattering in the vector boson scattering~(VBS) process $pp\to j j \ell^+\ell^-ν\barν$ at the large hadron collider~(LHC) using artificial neural networks~(ANNs). We find that the ANN is a powerful tool to reconstruct the energy scale of $γγ\to W^+W^-$ scattering. The factors affecting the effects of ANNs are also studied. In addition, we make an attempt to interpret the ANN and arrive at an approximate formula which has only five fitting parameters and works much better than the approximation derived from kinematic analysis. With the help of ANN approach, the unitarity bound is applied as a cut on the energy scale of $γγ\to W^+W^-$ scattering, which is found to has a significant suppressive effect on signal events. The sensitivity of the process $pp\to j j \ell^+\ell^-ν\barν$ to anomalous $γγWW$ couplings and the expected constraints on the coefficients at current and possible future LHC are also studied.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
