M. Chojnacki

Uniform Description of Soft Observables in Heavy-Ion Collisions at {radical}(s{sub NN})=200 GeV

We investigate the role of the initial condition used for the hydrodynamic evolution of the system formed in ultra-relativistic heavy-ion collisions and find that an appropriate choice motivated by the models of early-stage dynamics, specifically a simple two-dimensional Gaussian profile, leads to a uniform description of soft observables measured in the Relativistic Heavy-Ion Collider (RHIC). In particular, the transverse-momentum spectra, the elliptic-flow, and the Hanbury-Brown--Twiss correlation radii, including the ratio R_out/R_side as well as the dependence of the radii on the azimuthal angle (azHBT), are properly described. We use the perfect-fluid hydrodynamics with a realistic equation of state based on lattice calculations and the hadronic gas at high and low temperatures, respectively. We also show that the inclusion of the partonic free-streaming in the early stage allows to delay the start of the hydrodynamical description to comfortable times of the order of 1 fm/c. Free streaming broadens the initial energy-density profile, but generates the initial transverse and elliptic flow. The data may be described equally well when the hydrodynamics is started early, or with a delay due to partonic free-streaming.

Centrality dependence of charged particle production at large transverse momentum in Pb–Pb collisions at √sNN =2.76 TeV

The inclusive transverse momentum (

Free-streaming approximation in early dynamics of relativistic heavy-ion collisions

p_{\rm T}

Charge-dependent azimuthal correlations in Pb–Pb collisions at √sNN = 2.76 TeV

) distributions of primary charged particles are measured in the pseudo-rapidity range

Azimuthally sensitive femtoscopy in hydrodynamics with statistical hadronization from the BNL Relativistic Heavy Ion Collider to the CERN Large Hadron Collider

|\eta|<0.8

Early evolution of transversally thermalized partons

as a function of event centrality in Pb-Pb collisions at

J/ψ Polarization in pp Collisions at √s=7 TeV

\sqrt{s_{\rm{NN}}}=2.76

Size fluctuations of the initial source and event-by-event transverse momentum fluctuations in relativistic heavy-ion collisions

TeV with ALICE at the LHC. The data are presented in the

Formation of Hubble-like flow in little bangs

p_{\rm T}

Describing transverse dynamics and space-time evolution at RHIC in a hydrodynamic model with statistical hadronization

range