Measurement of higher order flow harmonics in PbPb collisions at 2.76 TeV by CMS

Collective flow is an important probe of the earliest stages in the expansion of the hot and dense matter created in relativistic heavy-ion collisions. Higher harmonics of the azimuthal distribution of emitted particles, in particular $v_3$ and $v_4$, complement $v_2$ measurements in elucidating the dynamical evolution of the bulk medium and providing constraints on its transport properties and initial conditions. With its large acceptance and broad rapidity coverage, the CMS detector is ideally suited to provide detailed analyses of higher order harmonic flow at the LHC. Measurements of higher order flow harmonics, $v_n$, in PbPb collisions at 2.76 TeV from the CMS detector will be presented as a function of $p_T$ and centrality. Connections of the results to the properties of the medium will be discussed.