Results on flow and correlations with the CMS detector

We present an overview of collective flow phenomena and dihadron correlations measurements from the CMS experiment at the LHC. Fourier components of the anisotropic azimuthal distribution, ranging from the second to the sixth component, are obtained using different analysis techniques, which have different sensitivities to non-flow and flow fluctuation effects. Utilizing a novel and unique high-$p_{\rm T}$ single-track high-level trigger, the results are presented over a broad $p_{\rm T}$ range up to approximately 60 GeV/$c$, as a function of pseudorapidity and collision centrality. These new data will provide essential information on both the hydrodynamic properties of the medium at low $p_{\rm T}$ and path length dependence of in-medium parton energy loss at high $p_{\rm T}$. Dihadron correlations are measured over a wide acceptance and $p_{\rm T}$ range. Long-range near-side (``ridge'') correlation structures are observed from low $p_{\rm T}$ (1 GeV/$c$) to very high $p_{\rm T}$ (at least 20 GeV/$c$).