Observation of electroweak production of a same-sign W boson pair in association with two jets in pp collisions at s√=13 TeV with the ATLAS detector Aaboud, M. Aguilar Saavedra, Juan Antonio Atlas Collaboration 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 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 σfid.=2.89+0.51−0.48(stat.)+0.29−0.28(syst.) fb. 2020-04-29T11:45:23Z 2020-04-29T11:45:23Z 2019-10-15 info:eu-repo/semantics/article Collaboration, A. T. L. A. S. (2019). Observation of electroweak production of a same-sign W boson pair in association with two jets in pp collisions at√ s= 13 TeV with the ATLAS detector. stat Phys Rev Lett, 123, 161801. http://hdl.handle.net/10481/61692 10.1103/PhysRevLett.123.161801 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España American Physical Society