Observation of electroweak production of a same-sign $W$ boson pair in association with two jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
Copyright policy )Observation of electroweak production of a same-sign $W$ boson pair in association with two jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
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 $69 \pm 7$ events, corresponding to an observed signal significance of 6.5 standard deviations. The measured fiducial signal cross section is $��^{\mathrm {fid.}}=2.89^{+0.51}_{-0.48} \mathrm{(stat.)} ^{+0.29}_{-0.28} \mathrm{(syst.)}$ fb.
30 pages in total, author list starting page 14, 3 figures, 2 tables, final version published in Phys. Rev. Lett. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-06
- Helmholtz Association of German Research Centres Germany
- Tsinghua University China (People's Republic of)
- University of Hong Kong China (People's Republic of)
- University of Bonn Germany
- University of Massachusetts System United States
electron, 13000 GeV-cms, W: leptonic decay, High Energy Physics - Experiment, W: pair production, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], info:eu-repo/classification/ddc/530, HIGH-ENERGIES, Multidisciplinary, rapidity: difference, Physics, ATLAS, Settore FIS/01 - FISICA SPERIMENTALE, CERN LHC Coll, Large Hadron Collider, Physical Sciences, channel cross section: measured, 51 Physical Sciences, 5107 Particle and High Energy Physics, p p: scattering, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], dijet: mass spectrum, FOS: Physical sciences, weak-interactions; high-energies; syststem, 530, dijet: associated production, phase space, same sign, muon, Standard deviation, Science & Technology, Phase space regions, electroweak interaction, Proton proton collisions, background, final state: ((n)jet dilepton), ATLAS detectors, 500, Invariant mass, WEAK-INTERACTIONS, Signal significance, Elementary Particles and Fields, 5106 Nuclear and Plasma Physics, Observation and measurement, p p: colliding beams, SYSTEM, 500.2, experimental results, ddc: ddc:500.2
electron, 13000 GeV-cms, W: leptonic decay, High Energy Physics - Experiment, W: pair production, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], info:eu-repo/classification/ddc/530, HIGH-ENERGIES, Multidisciplinary, rapidity: difference, Physics, ATLAS, Settore FIS/01 - FISICA SPERIMENTALE, CERN LHC Coll, Large Hadron Collider, Physical Sciences, channel cross section: measured, 51 Physical Sciences, 5107 Particle and High Energy Physics, p p: scattering, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], dijet: mass spectrum, FOS: Physical sciences, weak-interactions; high-energies; syststem, 530, dijet: associated production, phase space, same sign, muon, Standard deviation, Science & Technology, Phase space regions, electroweak interaction, Proton proton collisions, background, final state: ((n)jet dilepton), ATLAS detectors, 500, Invariant mass, WEAK-INTERACTIONS, Signal significance, Elementary Particles and Fields, 5106 Nuclear and Plasma Physics, Observation and measurement, p p: colliding beams, SYSTEM, 500.2, experimental results, ddc: ddc:500.2
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