Measurements of the $$\mathrm{ pp \to W \gamma\gamma }$$ and $$\mathrm{ pp \to Z \gamma\gamma }$$ cross sections and limits on anomalous quartic gauge couplings at $$\sqrt{s} =$$ 8 TeV
Here, measurements are presented of $$ \mathrm{ W \gamma\gamma } $$ and $$ \mathrm{ Z \gamma\gamma } $$ production in proton-proton collisions. Fiducial cross sections are reported based on a data sample corresponding to an integrated luminosity of 19.4 fb$$^{-1}$$ collected with the CMS detector at a center-of-mass energy of 8 TeV. Signal is identified through the $$\mathrm{ W } \to \ell\nu$$ and $$\mathrm{ Z }\to\ell\ell$$ decay modes, where $$\ell$$ is a muon or an electron. The production of $$ \mathrm{ W \gamma\gamma } $$ and $$ \mathrm{ Z \gamma\gamma } $$, measured with significances of 2.6 and 5.9 standard deviations, respectively, is consistent with standard model predictions. In addition, limits on anomalous quartic gauge couplings in $$ \mathrm{ W \gamma\gamma } $$ production are determined in the context of a dimension-8 effective field theory.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- The CMS collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1352006
- Report Number(s):
- FERMILAB-PUB-17-102-CMS; CMS-SMP-15-008; CERN-EP-2017-039; arXiv:1704.00366; 1589287
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2017, Issue 10; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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