Quark Matter 2012

Session

Parallel 6D: Correlations & Fluctuations (Chair O. Evdokimov)

160

17 Aug 2012, 14:00

457. Anisotropic flow of identified particles in Pb-Pb collisions at 2.76 TeV measured with ALICE at the LHC

Francesco Noferini (Universita e INFN (IT))

17/08/2012, 14:00

Oral Presentation

The anisotropic flow of identified particles is an important observable to probe the freeze-out properties, the parton energy loss and the partonic phase of the system created in heavy-ion collisions. We report on the elliptic and triangular flow measurements for a number of identified particles such as charged pions, kaons and (anti-)protons, as well as K0s , Λ/anti-Λ, Ξ, and Ω. The results...

221. Elliptic azimuthal anisotropy of charged hadrons and neutral pions in PbPb collisions at 2.76 TeV with CMS

Eric Andrew Appelt (Vanderbilt University (US))

17/08/2012, 14:20

Correlations and fluctuations

Oral Presentation

The elliptic flow anisotropies of charged particles and neutral pions (pi0s) have been measured by the CMS collaboration for PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV. The second Fourier components of the anisotropic azimuthal distribution are obtained using an event-plane technique for pi0s and four different analysis techniques for charged particles: event plane,...

484. Measurements of flow harmonics with the cumulant method from the ATLAS experiment

Tomasz Bold (AGH Univ. of Science amp; Technology, Krakow)

17/08/2012, 14:40

Oral Presentation

The measurement of the azimuthal anisotropy of charged particles obtained with the multi-particle correlations method will be presented and compared to the results obtained with the event plane method for Pb+Pb collisions at 2.76 TeV from the ATLAS experiment. Results on flow harmonics, determined from the cumulants of up to eight-particle correlations, will be shown over a wide transverse...

292. Two particle correlation measurements with respect to higher harmonic event planes at PHENIX

Takahito for the PHENIX Collaboration Todoroki (University of Tsukuba, RIKEN Nishina Center)

17/08/2012, 15:00

Oral Presentation

Two particle correlations provide key information on the interactions between hard-scattered partons and the hot dense medium created by ultra-relativistic heavy ion collisions. An important aspect of extracting jet functions from correlation measurements in heavy ion collisions is to estimate the underlying event background level and its modulation by vn. This is essential for the goal...

133. Hydrodynamic fluctuations in expanding medium

Prof. Misha Stephanov (UIC)

17/08/2012, 15:20

Correlations and fluctuations

Oral Presentation

We describe intrinsic hydrodynamic fluctuations of the expanding boost-invariant (Bjorken) solution. We find that these fluctuations are correlated over a wide rapidity range due to the propagation of the sound modes, whose dispersion is nontrivial because of the expansion. Since the magnitudes of these correlations are proportional to viscosities, their measurement can, in principle, be...

150. Mapping the hydrodynamic response to the initial geometry in heavy-ion collisions

Fernando Gardim (USP)

17/08/2012, 15:40

Correlations and fluctuations

Oral Presentation

We investigate how the initial geometry of a heavy-ion collision is transformed into final flow observables by solving event-by-event ideal hydrodynamics with realistic fluctuating initial conditions. We study quantitatively to what extent anisotropic flow ($v_n$) is determined by the initial eccentricity $\varepsilon_n$ for a set of realistic simulations, and we discuss which definition of...