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

The ATLAS collaboration; C. Bittrich; T. Herrmann; F. Iltzsche; M. Kobel; S. Todt; Philip Sommer

doi:10.1103/PhysRevLett.123.161801

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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Contributors

The ATLAS collaboration - , University of Bucharest, iThemba Laboratory for Accelerator Based Sciences, University of Pretoria, University of South Africa, University of Zululand, Cadi Ayyad University, New York University Abu Dhabi, University of Granada, CERN, University of California at Berkeley, University of Georgia (Tbilisi), Yeditepe University, Mohammed VI Polytechnic University (Author)
C. Bittrich - , Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
T. Herrmann - , Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
F. Iltzsche - , Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
M. Kobel - , Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
S. Todt - , Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
Philip Sommer - , Chair of Particle Physics (Author)

Chair of Experimental Particle Physics
Emmy Noether Junior Research Group Monte Carlo event generators
Mohamed I University
Aix-Marseille Université
University of Oklahoma
Azerbaijan National Academy of Sciences (ANAS)
Université Paris-Saclay
Royal Holloway University of London
University of Toronto
University of Copenhagen
University of Sussex
Tel Aviv University
Technion-Israel Institute of Technology
Argonne National Laboratory
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
The University of Tokyo
Johannes Gutenberg University Mainz
AGH University of Science and Technology
Northern Illinois University
Ludwig Maximilian University of Munich
Bogazici University
Rutherford Appleton Laboratory
University of California at Santa Cruz
University College London
University of Science and Technology of China (USTC)
Polish Academy of Sciences
University of Amsterdam
University of Freiburg

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=2.89-0.48+0.51(stat)-0.28+0.29(syst) fb.

Details

Original language	English
Pages	161801
Volume	123
Issue number	16
Journal	Physical review letters
Publication status	Published - 15 Oct 2019
Peer-reviewed	Yes

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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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