Recent ATLAS measurements of correlations in pp and p+Pb collisions

Recent measurements of features of the azimuthal distributions for charged particles in $pp$ and $p$+Pb collisions from the ATLAS experiment at the LHC are presented. To study the impact of hard processes on the azimuthal anisotropy, the effect of jets particles on the two-particle correlations in $pp$ collisions at $\sqrt{s}$ = 13 TeV is demonstrated. For the same collision system, the elliptic flow of muons from the decay of charm and bottom hadrons is also measured. Additionally, the azimuthal anisotropy of charged hadrons in $p$+Pb collisions up to a high transverse momentum of 50 GeV, is presented. To Investigate of the role of initial conditions in the formation of azimuthal anisotropy in small systems, the correlation between the mean transverse momentum and the magnitudes of the flow harmonics is measured in 5.02 TeV $p$+Pb collisions and compared to the Pb+Pb results. Furthermore, a measurement of the charged hadrons elliptic flow in photo-nuclear interactions in ultra-peripheral Pb+Pb collisions is presented which may help to interpret the $pp$ and $p$+Pb data.