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

International Conference on Particle Physics and Astrophysics

物理学;天文学

Kurova, A.S.^1 ; Soldatov, E.Yu.^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe highway 31, Moscow

115409, Russia^1

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

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012097/pdf
DOI  :  10.1088/1742-6596/798/1/012097

学科分类：天文学(综合)

来源: IOP

【 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.