Elliptic Flow of Charm and Strange Hadrons in High-Multiplicity p plus Pb Collisions at root(NN)-N-s=8.16 TeV

The elliptic azimuthal anisotropy coefficient (({v}{2})) is measured for charm (({D}^{0})) and strange (({K}{S}^{0}), (\Lambda ), ({\Xi }^{-}), and ({\Omega }^{-})) hadrons, using a data sample of (p+\mathrm{Pb}) collisions collected by the CMS experiment, at a nucleon-nucleon center-of-mass energy of (\sqrt{{s}{\mathrm{NN}}}=8.16\text{}\text{}\mathrm{TeV}). A significant positive ({v}{2}) signal from long-range azimuthal correlations is observed for all particle species in high-multiplicity (p+\mathrm{Pb}) collisions. The measurement represents the first observation of possible long-range collectivity for open heavy flavor hadrons in small systems. The results suggest that charm quarks have a smaller ({v}{2}) than the lighter quarks, probably reflecting a weaker collective behavior. This effect is not seen in the larger PbPb collision system at (\sqrt{{s}{\mathrm{NN}}}=5.02\text{}\text{}\mathrm{TeV}), also presented.