Initial Stages 2019

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

26 Jun 2019, 14:20

20m

301 (Pupin)

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

Speaker

Kurt Hill (University of Colorado)

Description

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.

Presentation materials

kurthill_atlas_hfmuonv2_pp13tev_final.pdf

kurthill_atlas_hfmuonv2_pp13tev_final.pptx