Measurement of the cross section for electroweak production of Zγ in association with two jets and constraints on anomalous quartic gauge couplings in proton–proton collisions at
Here, a measurement is presented of the cross section for the electroweak production of a Z boson and a photon in association with two jets in proton-proton collisions at $$\sqrt{s}$$= 8 TeV. The Z bosons are identified through their decays to electron or muon pairs. The measurement is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 inverse femtobarns. The electroweak contribution has a significance of 3.0 standard deviations, and the measured fiducial cross section is 1.86 $$+0.90\atop{-0.75}$$ (stat)$$+0.34\atop{-0.26}$$ (syst) ± 0.05 (lumi) fb, while the summed electroweak and quantum chromodynamic total cross section in the same region is observed to be 5.94 $$+1.53\atop{-1.35}$$ (stat) $$+0.43\atop{-0.37}$$ (syst) ± 0.13 (lumi) fb. Both measurements are consistent with the leading-order standard model predictions. Limits on anomalous quartic gauge couplings are set based on the Zγ mass distribution.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- CMS Collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1355806
- Alternate ID(s):
- OSTI ID: 1371838
- Report Number(s):
- FERMILAB-PUB-17-262-CMS; CMS-SMP-14-018; CERN-EP-2016-308; arXiv:1702.03025; S0370269317303453; PII: S0370269317303453
- Journal Information:
- Physics Letters B, Journal Name: Physics Letters B Vol. 770 Journal Issue: C; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
Web of Science
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