Studies of $Zγ$ production in association with a high-mass dijet system in pp collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

The production of a Z boson and a photon in association with a high-mass dijet system is studied using 20.2 fb$^{−1}$ of proton-proton collision data at a centre-of-mass energy of $\sqrt{s}=8$ TeV recorded with the ATLAS detector in 2012 at the Large Hadron Collider. Final states with a photon and a Z boson decaying into a pair of either electrons, muons, or neutrinos are analysed. Electroweak and total $pp$ → $Zγjj$ cross-sections are extracted in two fiducial regions with different sensitivities to electroweak production processes. Quartic couplings of vector bosons are studied in regions of phase space with an enhanced contribution from pure electroweak production, sensitive to vector-boson scattering processes $VV → Zγ$. No deviations from Standard Model predictions are observed and constraints are placed on anomalous couplings parameterized by higher-dimensional operators using effective field theory.


Publication Date:
Jul 21 2017
Date Submitted:
Jul 13 2018
ISSN:
1029-8479
Citation:
Journal of High Energy Physics
7
Note:
A freely accessible, full text version is available using the link(s) in External Resources.
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 Record created 2018-07-13, last modified 2019-04-03


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