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Observation of WZγ Production in pp Collisions at sqrt[s]=13 TeV with the ATLAS Detector
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- Aad, G. (author)
- Aix-Marseille University,CNRS/IN2P3
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- Åkesson, T.P.A. (author)
- Lund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Doglioni, C. (author)
- Lund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Ekman, P.A. (author)
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- (creator_code:org_t)
- NA, 2024
- 2024
- English.
- In: Physical Review Letters. - : NA. - 1079-7114 .- 0031-9007. ; 132:2
- Journal article (peer-reviewed)
Abstract
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- This Letter reports the observation of WZγ production and a measurement of its cross section using 140.1±1.2 fb^{-1} of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The WZγ production cross section, with both the W and Z bosons decaying leptonically, pp→WZγ→ℓ^{'}^{±}νℓ^{+}ℓ^{-}γ (ℓ^{(^{'})}=e, μ), is measured in a fiducial phase-space region defined such that the leptons and the photon have high transverse momentum and the photon is isolated. The cross section is found to be 2.01±0.30(stat)±0.16(syst) fb. The corresponding standard model predicted cross section calculated at next-to-leading order in perturbative quantum chromodynamics and at leading order in the electroweak coupling constant is 1.50±0.06 fb. The observed significance of the WZγ signal is 6.3σ, compared with an expected significance of 5.0σ.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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- ref (subject category)
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- Aad, G.
- Åkesson, T.P.A.
- Doglioni, C.
- Ekman, P.A.
- Hedberg, V.
- Herde, H.
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- Konya, B.
- Lytken, E.
- Poettgen, R.
- Simpson, N.D.
- Smirnova, O.
- Zou, W.
- Zwalinski, L.
- Lund-Jensen, Ben ...
- Ohm, Christian
- Strandberg, Jona ...
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