论文标题
观察光子诱导的$ W^+W^ - $ PP $ Collisions $ \ sqrt {s} = 13 $ tev使用Atlas检测器
Observation of photon-induced $W^+W^-$ production in $pp$ collisions at $\sqrt{s}=13$ TeV using the ATLAS detector
论文作者
论文摘要
这封信报告了观察到光子引起的$ W $ -BOSON对的产生，$γγ\ rightarrow ww $。该分析使用139 fb $^{ - 1} $的LHC Proton-Proton碰撞数据以$ \ sqrt {s} = 13 $ tev在2015 - 2018年期间记录。进行测量，选择一个电子和一个muon，将Diboson系统的衰减作为$ ww \ rightarrow e^\pmpmνμ^\mpν$最终状态。仅背景假设被拒绝，其意义远高于5标准偏差，这与蒙特卡洛模拟的期望一致。 $γγ\ rightarrow ww $过程的横截面为3.13 $ \ pm $ 0.31（stat。）$ \ pm $ \ $ 0.28（SYST。）fb以接近检测器的基准量进行测量，通过需要一个接收到检测器的基准量，需要通过电子和较大的direpton横向动量和零件的较大的符号，并获得了相反的符号。发现这与标准模型预测一致。
This letter reports the observation of photon-induced production of $W$-boson pairs, $γγ\rightarrow WW$. The analysis uses 139 fb$^{-1}$ of LHC proton-proton collision data taken at $\sqrt{s}=13$ TeV recorded by the ATLAS experiment during the years 2015-2018. The measurement is performed selecting one electron and one muon, corresponding to the decay of the diboson system as $WW\rightarrow e^\pmνμ^\mpν$ final state. The background-only hypothesis is rejected with a significance of well above 5 standard deviations consistent with the expectation from Monte Carlo simulation. A cross section for the $γγ\rightarrow WW$ process of 3.13$\pm$0.31(stat.)$\pm$0.28(syst.) fb is measured in a fiducial volume close to the acceptance of the detector, by requiring an electron and a muon of opposite signs with large dilepton transverse momentum and exactly zero additional charged particles. This is found to be in agreement with the Standard Model prediction.
