AI 中文总结
利用ATLAS探测器在\(13\) TeV的\(pp\)碰撞数据中观测\(γγjj\)的电弱产生，测量其基准和微分截面，与标准模型预测相符，还在有效场论背景下解释并对相关威尔逊系数设限。
AI 中文摘要
本论文展示了对两个孤立光子与两个喷注相关联的电弱产生的观测，以及相应的基准和微分截面的测量。分析使用了ATLAS在LHC收集的\(\sqrt{s}=13\) TeV、积分亮度为\(140\) fb\(^{-1}\)的质子 - 质子碰撞数据。观测到两个孤立光子与两个喷注的电弱产生，显著性为\(6.2\sigma\)，基准截面为\(\sigma^{\mathrm{EW}}_{\mathrm{obs}}= 13.8^{+3.0}_{-2.6}\, \mathrm{fb}\)，与标准模型预测的\(\sigma^{\mathrm{EW}}_{\mathrm{obs}}= 17.1^{+2.4}_{-2.4}\, \mathrm{fb}\)相符。测量了微分截面并与预测进行比较，还报告了两个孤立光子和两个喷注的QCD和电弱联合产生的基准和微分截面。此外，在有效场论背景下进行了解释，并对几个参数化异常四次规范耦合的八维算符的威尔逊系数设置了限制。
英文摘要
This Letter presents the observation of the electroweak production of two isolated photons in association with two jets together with measurements of the corresponding fiducial and differential cross sections. The analysis is performed using proton-proton collision data collected by ATLAS at the LHC at $\sqrt{s}$ = 13 TeV and with an integrated luminosity of 140 fb$^{-1}$. The electroweak production of two isolated photons in association with two jets is observed with a significance of $6.2 σ$ and with a fiducial cross-section of $σ^{\mathrm{EW}}_{\mathrm{obs}}= 13.8^{+3.0}_{-2.6}\, \mathrm{fb}$, in agreement with the Standard Model prediction of $σ^{\mathrm{EW}}_{\mathrm{obs}}= 17.1^{+2.4}_{-2.4}\, \mathrm{fb}$. Differential cross-sections are measured as a function of various kinematical variables probing photon and jet properties and compared with predictions. In addition, fiducial and differential cross-sections are reported for the combined QCD and electroweak production of two isolated photons and two jets. The measurement is also interpreted in the context of an effective field theory, and limits are set on the Wilson coefficients of several dimension-8 operators parameterising anomalous quartic gauge couplings.
Comments44 pages in total, author list starting page 27, 6 figures, 4 tables, submitting to PLB, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2022-16
