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

Session

Global and collective dynamics

Parallel Session 5-6

27 May 2011, 17:30

Théâtre National (Centre Bonlieu)

Conveners

Global and collective dynamics

• Johannes Wessels (Institut fuer Kernphysik - Westfaelische Wilhelms-Universitaet M)

333. Elliptic and triangular flow in the event-by-event 3+1D viscous hydrodynamics

Sangyong Jeon (McGill University)

27/05/2011, 17:30

Global and collective dynamics

Parallel

I will present results for elliptic and triangular flow coefficients v2 and v3 in Au+Au collisions at sqrt(s) = 200A GeV using event-by-event 3+1D viscous hydrodynamic simulations. I will report on the effect of initial state fluctuations and finite viscosities on the flow coefficients v2 and v3 as functions of transverse momentum and pseudo-rapidity. I will argue that simultaneous...

501. Elliptic flow at high transverse momentum in PbPb collisions at $\sqrt{s_{NN}} = 2.76$~TeV with the ALICE experiment

Alexandru Florin Dobrin (Wayne State University)

27/05/2011, 17:50

Global and collective dynamics

Parallel

As a consequence of the energy loss of highly energetic parton propagating through a dense medium, jet quenching is an important probe of QGP created in high energy heavy-ion collisions. Jet quenching leads to the suppression of particle production at high transverse momenta. An observable that can be used to better constrain the mechanism responsible for the parton energy loss is the elliptic...

313. Turbulent fluctuations around Bjorken flow

Dr Stefan Floerchinger (CERN)

27/05/2011, 18:10

Global and collective dynamics

Parallel

For large Reynolds number (which is inverse to viscosity), fluids are known to develop turbulence. Therefore, the phenomenological evidence for a small viscosity suggests that the hydrodynamical description of heavy ion collisions may have a turbulent regime. Assuming that averaged velocities are described by Bjorkens model, we investigate local fluctuations around it. These perturbations are...

137. Far-from-equilibrium anisotropic collective flow

Dr Clément Gombeaud (University of Bielefeld), Prof. Nicolas Borghini (University of Bielefeld)

27/05/2011, 18:30

Global and collective dynamics

Parallel

Novel analytical results for the anisotropic collective flow of massive particles with a small interaction cross-section are presented. In particular, we show that, even when particles rescatter at most once, a sizable elliptic flow $v_2$ is generated, with mass ordering of the various particle species.

573. Identified particles from viscous hydrodynamics

Denes Molnar (Purdue University)

27/05/2011, 18:50

Global and collective dynamics

Parallel

Much of our understanding of the collision dynamics at RHIC and LHC relies on contrasting hydrodynamic or hydro+transport calculations with experimental data. For example, early evidence for rapid thermalization and quark-gluon plasma phase transition at RHIC came from particle spectra and the pion-proton splitting of differential elliptic flow. An inevitable component in these...

578. Measurement of the electromagnetic dissociation cross-section of Pb nuclei at 2.76 A Tev with the ALICE ZDC

Dr Chiara Oppedisano (INFN, Sezione di Torino)

27/05/2011, 19:10

Global and collective dynamics

Parallel

Electromagnetic dissociation of heavy nuclei in ultra-peripheral interactions at high energies can be used to monitor the beam luminosity at colliders. Neutrons emitted by the excited nuclei close to beam rapidity are detected by the ALICE Zero Degree Calorimeters (ZDC) with full acceptance, providing a precise measurement of the event rate. During the 2010 Pb-Pb run, a dedicated data...