Study of the LHC experiments sensitivity to anomalous quartic gauge couplings in Zγγ production during Run2

[摘要] Run2 sensitivity to anomalous quartic gauge couplings was estimated for ATLAS experiment at LHC with increased energy of proton-proton collisions √s=13 TeV and expected 40 fb-1of integral luminosity. Simulation of Zγγ process with anomalous ZZγγ and Zγγ γ couplings was performed using VBFNLO MC generator. Differential distributions on four-body invariant mass of final state particles was used for extraction of expected limits on Effective Field Theory parameters fT0/Λ4, fT5/Λ4, fT9/Λ4, fM2/Λ4, fM3/Λ4. Combined limits are obtained from two charged leptonic decay channels of Z boson (Zγ γ → l+l-γγ, where l = e or μ). Unitarity of expected limits was studied using dipole form factor approach.

[发布机构] National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe highway 31, Moscow; 115409, Russia^1

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] ATLAS experiment;Effective field theory;Form factors;Gauge couplings;Invariant mass;Leptonic decay;LHC experiments;Proton proton collisions