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

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Authors

Colleges, School and Institutes

Abstract

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.  

Bibliographic note

3 figures, 2 tables, final version published in Physical Review Letters. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-06

Details

Original languageEnglish
Article number161801
Number of pages21
JournalPhysical Review Letters
Volume123
Issue number16
Publication statusPublished - 15 Oct 2019

Keywords

  • hep-ex