Speaker
Description
Measurements of production and azimuthal anisotropy of prompt charm mesons ($D^0$ and $D^*$) are presented using $p$+Pb data at $\sqrt{s_{NN}}=8.16$ TeV collected in 2016 by ATLAS. Prompt charmed meson production is measured in minimum bias $p$+Pb data, and is reconstructed via two decay channels: $D^0\rightarrow K+\pi$ and $D^*\rightarrow D^0+\pi\rightarrow K+\pi+\pi$. The measured charm meson production cross sections are comparable with FONLL predictions scaled by $A_\mathrm{Pb} = 208$ within uncertainties. The production asymmetry between forward and backward center-of-mass rapidities for the charm mesons is studied for the range of $|y^*| < 0.5$, and no significant asymmetry is observed. The anisotropy is studied using two-particle correlations, with a template fitting procedure used to subtract the residual jet contribution. Finite long-range correlations are observed for particle pairs containing $D^*$ mesons. The flow modulation of $D^*$ is broadly consistent with what has been observed for light hadrons and muons from heavy quark decays.
| Content type | Experiment |
|---|---|
| Collaboration | ATLAS |
| Centralised submission by Collaboration | Presenter name already specified |
