ИСТИНА

The collective flow phenomena and Ridge effect from the CMS experiment at the LHC in PbPb, pPb and pp collisions will be reported. The higher-order flow anisotropies of charged particles have been studied by the CMS collaboration for PbPb and pPb collisions. Long-range near-side ("ridge") correlation structures are observed from low pT (1 GeV/c) to very high pT (at least 20 GeV/c). Their connection to the single-particle azimuthal anisotropy is extensively investigated via the factorization studies of Fourier decomposition of dihadron correlations. Higher-order harmonics provides important insight on the initial-state eccentricity fluctuations and helps further constrain the transport properties of the medium. Comparison pT- and centrality dependence of flow and Ridge analysis data show the important role of high harmonics with n > 2, which constraints to the theoretical models of QGP.