JINR Participation in the Physics Program of the ATLAS Experiment in 2015–2019 Period

The main purpose of the international ATLAS experiment—is the study of the proton-proton interactions at unprecedented energies of the LHC collider (from 7 to 14 TeV in center-of-mass system of colliding protons). In particular, the detailed probationof the Standard Model, its application limits, search for solutions of the key problems of the current stage of physics and astrophysics , such as origin of the elementary particles masses, nature of dark matter in the Universe, existence of extra dimensions and others are carried out with the ATLAS. Absolutely new and unique data will be obtained based on a multifaceted and comprehensive analyses of the proton-proton scattering processes. These data analyses will allow to answer several fundamental physical problems. Scientists from JINR successfullyparticipate in solving a number of such problems. This report briefly summarizes the main achievements of JINR team in physics analyses and participation in the computing system and GRID for the period of the 2015–2019. During this period it was published 28 papers with significant participation of the JINR staff, more than 20 talks at international conferences in addition to many reports of the working meeting within the Collaboration.