Underlying event in jet events at 7TeV with the ATLAS experiment

The distributions sensitive to underlying event were measured in jet events in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$ = 7 TeV with the ATLAS detector at the LHC. Charged particle multiplicity, charged and inclusive sum $p_\mathrm{T}$ densities, in the regions azimuthally transverse to the hardest jet, are presented as functions of the hardest jet $p_\mathrm{T}$ from 20 GeV to 800 GeV. The measurements of inclusive sum $p_\mathrm{T}$ distributions of charged and neutral particles are extended up to forward pseudorapidity $|\eta|< 4.8$. Separate inclusive jet and exclusive dijet event selections, and event-by-event transverse min/max regions, are included in this work for all observables allowing for a detailed studies of the underlying event models implemented in Monte-Carlo generators.