Method for Setting Limits on Effective Theory Coupling Constants Using Electroweak Zγ Production for Data From Run-2 of ATLAS Experiment

   Motivation of the search for deviation from Standard Model (SM) comes from its obvious incompleteness and desire to build more general theory of particle physics. In this paper search for new physics is realized using the indirect method based on changes in the known particles interactions due to the impact of physics beyond the SM. These deviations from SM interactions are called anomalous couplings. In this paper process of electroweak Z y production is studied. This process is extremely sensitive to anomalous quartic gauge couplings. The model-independent phenomenological model effective field theory is used to parameterize the anomalous couplings in the Lagrangian as higher dimensional operators. The resulting Lagrangian contains each of these operators with some coefficients which are the coupling constants of the effective theory. The method developed for setting of the 1-dimensional limits on these coefficients is described in the paper. As a result, it becomes possible to obtain expected limits on some coupling constants, which are more precise than currently existing.

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