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  4. Measurement of electroweak-induced production of W$\gamma$ with two jets in pp collisions at $ \sqrt{s}=8 $ TeV and constraints on anomalous quartic gauge couplings
 
research article

Measurement of electroweak-induced production of W$\gamma$ with two jets in pp collisions at $ \sqrt{s}=8 $ TeV and constraints on anomalous quartic gauge couplings

Khachatryan, Vardan
•
Sirunyan, Albert M
•
Tumasyan, Armen
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June 20, 2017
Journal of High Energy Physics

A measurement of electroweak-induced production of Wγ and two jets is performed, where the W boson decays leptonically. The data used in the analysis correspond to an integrated luminosity of 19.7 fb$^{−1}$ collected by the CMS experiment in $ \sqrt{s}=8 $ TeV proton-proton collisions produced at the LHC. Candidate events are selected with exactly one muon or electron, missing transverse momentum, one photon, and two jets with large rapidity separation. An excess over the hypothesis of the standard model without electroweak production of Wγ with two jets is observed with a significance of 2.7 standard deviations. The cross section measured in the fiducial region is 10.8 ± 4.1(stat) ± 3.4(syst) ± 0.3(lumi) fb, which is consistent with the standard model electroweak prediction. The total cross section for Wγ in association with two jets in the same fiducial region is measured to be 23.2 ± 4.3(stat) ± 1.7(syst) ± 0.6(lumi) fb, which is consistent with the standard model prediction from the combination of electroweak and quantum chromodynamics-induced processes. No deviations are observed from the standard model predictions and experimental limits on anomalous quartic gauge couplings f${M,0−7}$ /Λ$^{4}$, f${T,0−2}$ /Λ$^{4}$, and f$_{T,5−7}$ /Λ$^{4}$ are set at 95% confidence level.

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Type
research article
DOI
10.1007/JHEP06(2017)106
ArXiv ID

1612.09256

Author(s)
Khachatryan, Vardan
Sirunyan, Albert M
Tumasyan, Armen
Adam, Wolfgang
Aşılar, Ece
Bergauer, Thomas
Brandstetter, Johannes
Brondolin, Erica
Dragicevic, Marko
Erö, Janos
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Date Issued

2017-06-20

Publisher

Springer Nature

Published in
Journal of High Energy Physics
Volume

2017

Issue

6

Start page

106

Subjects

p p: scattering

•

p p: colliding beams

•

W: hadroproduction

•

jet: associated production

•

coupling: gauge

•

coupling: (4gauge boson)

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coupling: anomaly

•

electroweak interaction: standard model

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cross section: measured

•

W: leptonic decay

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transverse momentum: missing-energy

•

total cross section: measured

•

CERN LHC Coll

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photon: associated production

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rapidity

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CMS

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experimental results

•

8000 GeV-cms

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LPHE  
Available on Infoscience
February 17, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/165876
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