# QM 2011 - XXII International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

May 22 – 28, 2011
Centre Bonlieu
Europe/Zurich timezone

## Measurement of higher order flow harmonics in PbPb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV by CMS

Not scheduled
Théâtre National (Centre Bonlieu)

### Théâtre National

#### Centre Bonlieu

France
Board: 31
Poster Global and collective dynamics

### Speaker

Collaboration CMS (UCLouvain)

### Description

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. 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 $v_n$ (n = 3 to n = 6) in PbPb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV using the cumulant and Lee-Yang zeros methods will be presented as a function of $p_T$ and centrality. The scaling of the higher order flow harmonics with initial participant eccentricity and the ratios of the flow harmonics, such as $v_4$/$v_{2}^2$, will be explored and discussed.

### Presentation materials

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