17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

From full stopping to transparency in a holographic model of heavy ion collisions

20 Jul 2013, 11:46
23m
F3 (KTH Campus)

F3

KTH Campus

Talk presentation Non-perturbative QFT and String Theory Non-perturbative QFT and String Theory

Speaker

Michal P. Heller (Universiteit van Amsterdam)

Description

We numerically simulate planar shock wave collisions in anti-de Sitter space as a model for heavy ion collisions of large nuclei. We uncover a cross-over between two different dynamical regimes as a function of the collision energy. At low energies the shocks first stop and then explode in a manner approximately described by hydrodynamics, in close similarity with the Landau model. At high energies the receding fragments move outwards at the speed of light, with a region of negative energy density and negative longitudinal pressure trailing behind them. The rapidity distribution of the energy density at late times around mid-rapidity is not approximately boost-invariant but Gaussian, albeit with a width that increases with the collision energy.

Primary author

Michal P. Heller (Universiteit van Amsterdam)

Co-authors

David Mateos (ICREA & U. Barcelona) Jorge Casalderrey Solana (University of Barcelona (ES)) Mr Wilke van der Schee (Utrecht Universiteit)

Presentation Materials