8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

Hydrodynamic flow in Pb+Pb collisions observed via azimuthal angle correlations of charged hadrons

9 Aug 2011, 16:00
25m
552 B (Rhode Island Convention Center)

552 B

Rhode Island Convention Center

Parallel contribution Heavy Ion Physics/Hot and Dense QCD Heavy Ion Physics/Hot and Dense QCD

Speaker

Charles Felix Maguire (Department of Physics and Astronomy-Vanderbilt University)

Description

Azimuthal angle correlations of charged hadrons were measured in $\sqrt s_{NN}$ = 2.76 TeV Pb+Pb collisions by the CMS experiment. The distributions exhibit anisotropies that are correlated with the event-by-event orientation of the reaction plane. Several methods were employed to extract the strength of the signal: the event-plane, cumulant and Lee-Yang Zeros methods. These methods have different sensitivity to correlations that are not caused by the collective motion in the system (non-flow correlations due to jets, resonance decays, and quantum correlations). The second Fourier coefficient of the charged hadron azimuthal distributions was measured as a function of transverse momentum, pseudorapidity and centrality in a broad kinematic range: $0.3 < p_T < 12.0$ GeV/c, $|\eta| < 2.4)$, as a function of collision centrality. In addition, first results on odd Fourier components will be presented and their connection to the hydrodynamic medium will be discussed.

Primary author

Charles Felix Maguire (Department of Physics and Astronomy-Vanderbilt University)

Presentation Materials