Measurement of electroweak-induced production of Wγ with two jets in pp collisions at √s=8 TeV and constraints on anomalous quartic gauge couplings
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 √ s = 8 TeV proton-proton collisions produced at the LHC....
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Springer Verlag
2017
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/63025/ http://irep.iium.edu.my/63025/ http://irep.iium.edu.my/63025/ http://irep.iium.edu.my/63025/1/63025_Measurement%20of%20electroweak-induced%20production%20_article.pdf http://irep.iium.edu.my/63025/2/63025_Measurement%20of%20electroweak-induced%20production%20_scopus.pdf |
| Summary: | 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
√
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 signifi-
cance 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 electroweakand
quantum chromodynamics-induced processes. No deviations are observed from the
standard model predictions and experimental limits on anomalous quartic gauge couplings
fM,0−7/Λ
4
, fT,0−2/Λ
4
, and fT,5−7/Λ
4 are set at 95% confidence level. |
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