论文标题
在$ \ sqrt {s} = 13 $ tev的$zγγ$生产中的$zγγ$生产
Measurement of $Zγγ$ production in $pp$ collisions at $\sqrt{s}= 13$ TeV with the ATLAS detector
论文作者
论文摘要
与两个光子联合的$ z $玻色子生产的横截面以质子$ - $质子的碰撞测量，以13 TEV的质量质量碰撞。所使用的数据对应于Atlas实验在LHC运行2期间记录的139 fb $^{ - 1} $的集成光度。测量结果使用$ z $玻色子的电子和雄性衰减通道，以及一个基准的相位空间区域，该区域未从瘦素辐射光子。综合$ z（\ rightarrow \ ell \ ell \ ell）γγ$横截面的精度为12％，差异横截面的测量是$Zγ$系统的六个运动变量的函数。将数据与MC事件生成器的预测进行了比较，这些预测准确至QCD中的近级领先顺序。横截面测量值用于在有效的田间理论框架内对尺寸8运算符的耦合强度设置限制。
Cross-sections for the production of a $Z$ boson in association with two photons are measured in proton$-$proton collisions at a centre-of-mass energy of 13 TeV. The data used correspond to an integrated luminosity of 139 fb$^{-1}$ recorded by the ATLAS experiment during Run 2 of the LHC. The measurements use the electron and muon decay channels of the $Z$ boson, and a fiducial phase-space region where the photons are not radiated from the leptons. The integrated $Z(\rightarrow\ell\ell)γγ$ cross-section is measured with a precision of 12% and differential cross-sections are measured as a function of six kinematic variables of the $Zγγ$ system. The data are compared with predictions from MC event generators which are accurate to up to next-to-leading order in QCD. The cross-section measurements are used to set limits on the coupling strengths of dimension-8 operators in the framework of an effective field theory.
