Angular momentum conservation in heavy ion collisions at very high energy

• DOI: 10.1103/physrevc.77.024906
• Publication Date: 2008-02-21T18:20:27Z
• Authors: F. Becattini; F. Piccinini; J. Rizzo
• Keywords: Elliptic flow; Jet quenching

The effects of angular momentum conservation in peripheral heavy ion collisions at very high energy are investigated. It is shown that the initial quark-gluon plasma should enhance azimuthal anisotropy particle spectra (elliptic flow) with respect to usual picture where only geometrical eccentricity nuclear overlap region responsible for anisotropy. In hydrodynamical terms, entails a nontrivial dependence longitudinal flow velocity on transverse coordinates. This gives rise nonvanishing vorticity equations motion, which enhances expansion rate supposedly created fluid compensating possible quenching effect viscosity. A distinctive signature generation an average polarization emitted hadrons, we provide analytical expressions. These phenomena might be better observed LHC, density will larger and envisage increase elliptic coefficient ${v}_{2}$ RHIC energies.