论文标题
观察和测量正向质子散射与通过光子融合机制产生的Lepton对结合的观察和测量
Observation and measurement of forward proton scattering in association with lepton pairs produced via the photon fusion mechanism at ATLAS
论文作者
论文摘要
提出了与Lepton Pairs（$ e^+E^ - +P $或$μ^+μ^ - +P $）相关的前向质子散射的观察。散落的质子是由Atlas正向质子光谱仪检测到的，而中央地图集检测器则重建了叶子。分析了2017年记录的Proton-Proton碰撞数据，以$ \ sqrt {s} = 13 $ tev的质量中心能量进行分析，对应于14.6 fb $^{ - 1} $的集成光度。选择了$ EE+P $（$μμ+P $）最终状态中的57（123）个候选人，从而允许仅背景的假设被拒绝，其显着性超过每个通道中的五个标准偏差。引入了质子标记技术，以用于基准检测器接受中的横截面测量值，对应于$σ_{ee+p} $ = 11.0 $ \ pm $ 2.6（stat。）$ \ pm $ \ pm $ 1.2（syst。syst。）$ \ pm $ 0.3（lumi。 $ \ pm $ 0.9（SYST。）$ \ pm $ 0.2（LUMI。）FB分别在Dielectron和Dimuon频道中。
The observation of forward proton scattering in association with lepton pairs ($e^+e^-+p$ or $μ^+μ^-+p$) produced via photon fusion is presented. The scattered proton is detected by the ATLAS Forward Proton spectrometer while the leptons are reconstructed by the central ATLAS detector. Proton-proton collision data recorded in 2017 at a center-of-mass energy of $\sqrt{s} = 13$ TeV are analyzed, corresponding to an integrated luminosity of 14.6 fb$^{-1}$. A total of 57 (123) candidates in the $ee+p$ ($μμ+p$) final state are selected, allowing the background-only hypothesis to be rejected with a significance exceeding five standard deviations in each channel. Proton-tagging techniques are introduced for cross-section measurements in the fiducial detector acceptance, corresponding to $σ_{ee+p}$ = 11.0 $\pm$ 2.6 (stat.) $\pm$ 1.2 (syst.) $\pm$ 0.3 (lumi.) fb and $σ_{μμ+p}$ = 7.2 $\pm$ 1.6 (stat.) $\pm$ 0.9 (syst.) $\pm$ 0.2 (lumi.) fb in the dielectron and dimuon channel, respectively.
