Volume 397 - The Ninth Annual Conference on Large Hadron Collider Physics (LHCP2021) - Heavy ions
Heavy flavor collectivity in small systems
G. Krintiras*  on behalf of the ALICE , ATLAS , and CMS Collaborations
Full text: pdf
Pre-published on: October 20, 2021
Published on: November 17, 2021
Abstract
The presence of correlations between particles significantly separated in pseudorapidity in proton-proton and proton-nucleus collisions revealed surprises in the early LHC data. Are the physical processes responsible for the observed long-range pseudorapidity correlations and their azimuthal structure the same in small collision systems as in heavy ion collisions? Whereas in the case of heavy ion collisions flow'' is interpreted as generated by initial geometric inhomogeneities, calculations indicate that initial-state momentum correlations are present and could contribute to the observed azimuthal anisotropy in small systems. Probes involving heavy quarks provide us with a unique opportunity to disentangle different quantum chromodynamics effects at the boundary between low- and high-$p_{\mathrm{T}}$ interactions, and hence shed light on the origin of flow in small collision systems. A selection of the latest measurements is presented for the flow and production of heavy flavor hadrons and their decay products.
DOI: https://doi.org/10.22323/1.397.0059
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