Measurement of the long--range pseudorapidity correlations between muons and charged-particles in $\sqrt{s_{\mathrm{NN}}}$=8.16~TeV proton-lead collisions with the ATLAS detector

Measurements of correlations between inclusive charged-particle pairs and between inclusive charged-particle and muon pairs in relative azimuthal angle ($\Delta\phi$) and pseudorapidity ($\Delta\eta$) are presented for $p$+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$=8.16~TeV using muons and charged particles with $|\eta|<2.5$. The correlations involving the muons are interesting as the muons primarily come from heavy-flavor decays and studying these correlations gives an understanding of the long-range correlations involving heavy-flavor quarks. The measurements show the presence of long-range correlations between muons and inclusive charged-particles extending to $|\Delta\eta|=5$. A template fitting method is used to remove the contribution from dijets to the correlations, and obtain the second-order Fourier coefficient, $v_{2,2}$, corresponding to the genuine long-range correlations. The $v_{2,2}$ is factorized to obtain the single-particle anisotropy coefficient, $v_2$, of the muons. The dependence of the muon-$v_2$ on the event multiplicity and on the muon transverse momentum are presented. The measurements presented here correspond to an integrated luminosity of 171~$\mathrm{nb}^{-1}$.