Measurements of minimum bias events, underlying event and particle production properties in ATLAS

Abstract

The measurements of the minimum bias events provide valuable information on the basic properties of the $pp$ interactions. The results at the new highest energy of $pp$ collisions, $\sqrt{s}$ = 13 TeV, obtained using the ATLAS detector, are shown. They include distributions of charged particle pseudorapidity density, transverse momentum and multiplicity. The properties of the underlying event, determined with respect to a leading high-$p_{T}$ particle, are also presented. In both cases the new results are compared with those from earlier studies of the $pp$ collisions at $\sqrt{s}$ = 7 TeV.Comment: Proceedings of the 23rd Low-x Meeting, Sandomierz, Poland, September 1-5, 2015, 11 pages, 11 figure