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Jun 24 – 28, 2019
US/Eastern timezone
5th International Conference on the Initial Stages in High-Energy Nuclear Collisions

ATLAS measurements of azimuthal anisotropy of heavy flavor hadrons in Pb+Pb, $p$+Pb and $pp$ collisions

Jun 26, 2019, 2:20 PM
301 (Pupin)



Oral Collectivity in small systems Parallel: Collectivity in small systems 1


Kurt Hill (University of Colorado)


ATLAS measurements of azimuthal anisotropy and suppression of muons from heavy flavor decays in Pb+Pb collisions are presented. The measurements are extended to smaller systems of $p$+Pb and $pp$ collisions, where no significant modification of the heavy flavor production are observed.In the smaller systems, a template fit method is used to subtract non-flow contributions using simultaneous fit to low and high charged-particle multiplicity samples. The heavy flavor flow in $p$+Pb is studied using multiple probes, including prompt $D^{0}$ mesons, J/$\psi$, and muons from semi-leptonic decays of heavy flavor hadrons. In $pp$ collisions, new measurements of flow coefficient of muons from heavy flavor decays are also presented. The observed heavy flavor azimuthal anisotropies in $p$+Pb and $pp$ collisions are found to be qualitatively similar to those of light hadrons indicating a similar origin for both types of particles.

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