Faculté des Sciences, Université Mohamed Premier and LPTPM, Oujda, Morocco.
CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France.
Phys Rev Lett. 2019 Oct 18;123(16):161801. doi: 10.1103/PhysRevLett.123.161801.
This Letter presents the observation and measurement of electroweak production of a same-sign W boson pair in association with two jets using 36.1 fb^{-1} of proton-proton collision data recorded at a center-of-mass energy of sqrt[s]=13 TeV by the ATLAS detector at the Large Hadron Collider. The analysis is performed in the detector fiducial phase-space region, defined by the presence of two same-sign leptons, electron or muon, and at least two jets with a large invariant mass and rapidity difference. A total of 122 candidate events are observed for a background expectation of 69±7 events, corresponding to an observed signal significance of 6.5 standard deviations. The measured fiducial signal cross section is σ^{fid}=2.89_{-0.48}^{+0.51}(stat)_{-0.28}^{+0.29}(syst) fb.
这封信件介绍了使用 ATLAS 探测器在质心能量为 sqrt[s]=13 TeV 的质子-质子碰撞数据中，观测和测量电弱产生的同号 W 玻色子对与两个喷注的关联，数据量为 36.1 fb^{-1}。分析是在探测器有效相位空间区域进行的，该区域由两个同号电子或缪子和至少两个具有大不变质量和快度差的喷注的存在定义。对于背景预期的 69±7 个事件，总共观察到 122 个候选事件，对应的观测信号显著性为 6.5 个标准差。测量的有效信号截面为 σ^{fid}=2.89_{-0.48}^{+0.51}(stat)_{-0.28}^{+0.29}(syst) fb。
