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Measurement of electroweak Z(νν¯)γjj production and limits on anomalous quartic gauge couplings in pp collisions at √s = 13 TeV with the ATLAS detector ATLAS Collaboration
Abstract
The electroweak production of Z(νν¯)γ in association with two jets is studied in a regime with a photon of high transverse momentum above 150 GeV using proton–proton collisions at a centre-of-mass energy of 13 TeV at the Large Hadron Collider. The analysis uses a data sample with an integrated luminosity of 139 fb−1 collected by the ATLAS detector during the 2015–2018 LHC data-taking period. This process is an important probe of the electroweak symmetry breaking mechanism in the Standard Model and is sensitive to quartic gauge boson couplings via vector-boson scattering. The fiducial Z(νν¯)γjj cross section for electroweak production is measured to be 0.77+0.34 −0.30 fb and is consistent with the Standard Model prediction. Evidence of electroweak Z(νν¯)γjj production is found with an observed significance of 3.2σ for the background-only hypothesis, compared with an expected significance of 3.7σ. The combination of this result with the previously published ATLAS observation of electroweak Z(νν¯)γjj production yields an observed (expected) signal significance of 6.3σ (6.6σ). Limits on anomalous quartic gauge boson couplings are obtained in the framework of effective field theory with dimension-8 operators.
Item Metadata
Title |
Measurement of electroweak Z(νν¯)γjj production and limits on anomalous quartic gauge couplings in pp collisions at √s = 13 TeV with the ATLAS detector
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Creator | |
Publisher |
Springer Berlin Heidelberg
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Date Issued |
2023-06-14
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Description |
The electroweak production of Z(νν¯)γ in association with two jets is studied in
a regime with a photon of high transverse momentum above 150 GeV using proton–proton
collisions at a centre-of-mass energy of 13 TeV at the Large Hadron Collider. The analysis
uses a data sample with an integrated luminosity of 139 fb−1
collected by the ATLAS
detector during the 2015–2018 LHC data-taking period. This process is an important probe
of the electroweak symmetry breaking mechanism in the Standard Model and is sensitive
to quartic gauge boson couplings via vector-boson scattering. The fiducial Z(νν¯)γjj cross
section for electroweak production is measured to be 0.77+0.34
−0.30 fb and is consistent with the
Standard Model prediction. Evidence of electroweak Z(νν¯)γjj production is found with
an observed significance of 3.2σ for the background-only hypothesis, compared with an
expected significance of 3.7σ. The combination of this result with the previously published
ATLAS observation of electroweak Z(νν¯)γjj production yields an observed (expected)
signal significance of 6.3σ (6.6σ). Limits on anomalous quartic gauge boson couplings are
obtained in the framework of effective field theory with dimension-8 operators.
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Subject | |
Genre | |
Type | |
Language |
eng
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Date Available |
2023-08-08
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution 4.0 International (CC BY 4.0)
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DOI |
10.14288/1.0435092
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URI | |
Affiliation | |
Citation |
Journal of High Energy Physics. 2023 Jun 14;2023(6):82
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Publisher DOI |
10.1007/JHEP06(2023)082
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty; Researcher
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Copyright Holder |
The Author(s)
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution 4.0 International (CC BY 4.0)