Strange hadron collectivity in pPb and PbPb collisions

The collective behavior of K$^0_\mathrm{S}$ and $\Lambda/\bar{\Lambda}$ strange hadrons is studied by measuring the elliptic azimuthal anisotropy ($v_2$) using scalar-product multiparticle correlation methods. Proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy $\sqrt{s_\mathrm{NN}}$ = 8.16 TeV lead-lead (PbPb) 5.02 collected CMS experiment LHC are investigated. Nonflow effects in pPb subevent cumulant analysis excluding events where jet with transverse momentum greater than 20\GeV present. hadron $v_2$ values extracted \pPb via four- six-particle method found to be nearly identical, suggesting behavior. Comparisons PbPb results for both charged particles illustrate how event-by-event flow fluctuations depend on system size.