Publication: Strange, charm and bottom hadrons flow in pp, pPb and PbPb collisions
Abstract
We present the elliptic azimuthal anisotropy coefficient (v2) of the identified strange hadrons, KS0 and Λ, in pPb and PbPb collisions at 5.02 TeV at mid-rapidity (|y| < 1), and the heavy-flavor hadrons, D0 and J/ψ, in pPb at 8.16 TeV and high-multiplicity pp at 13 TeV and Υ(1S) and Υ(2S), in PbPb collisions at 5.02 TeV. The data samples were collected with the CMS experiment at the LHC. The v2 coefficients of identified strange hadrons were measured using the scalar product and multi-particle cumulant methods as a function of pT for different centralities in PbPb collisions and event multiplicities in pPb collisions and compared with inclusive charged hadrons as well as the hydrodynamic calculations with initial conditions. The v2 coefficients of D0 and J/ψ mesons in pPb collisions are measured using the long-range two-particle correlation technique and compared with the results from color glass condensate (CGC) model. The positive v2 results of D0 and J/ψ in high multiplicity pp and pPb collisions suggest the collectivity of charm quarks in small system. For the first time, collectivity of b hadrons are studied via non-prompt D0 using long-range two-particle correlation technique and Υ(1S) and Υ(2S) mesons using scalar product method. The v2 results for Υ(1S) meson as a function of pT is compared with theoretical predictions from five different approaches. These measurements provide insights into the origin of the collective phenomena in small and large systems.