Speaker
Description
Measurements of long-range, collective azimuthal correlations involving heavy-flavor quarks provide a powerful tool for unraveling the origin of the collectivity observed in small collision systems. In particular, these measurements are sensitive to the early stages of the collisions. As compared to those for light flavor hadrons, large azimuthal anisotropy signals have been observed by CMS for charm hadrons, including prompt $D^{0}$ and J/$\Psi$ particles, in high multiplicity pPb collisions. With new pp data collected by the CMS experiment at the LHC in 2018, collectivity of prompt $D^{0}$ meson is studied in the smallest collision system via measurements of elliptic azimuthal anisotropy ($v_2$) as a function of event multiplicity and transverse momentum. Results are compared to light flavor species, and also to larger pPb and PbPb systems, providing new insights to the heavy quark collectivity developed in small systems.
