Statistical function instability under strong color magnetic field in 2PI approach

20 May 2014, 16:30
spectrum (darmstadtium)



Board: D-05
Poster Approach to Equilibrium Poster session


Shoichiro Tsutsui (Kyoto University)


Important mechanisms of thermalization in relativistic heavy ion collisions are considered to be particle production and collision processes under the time dependent classical gluon fields and plasma instabilities. Non-equilibrium quantum field theory with 2 particle irreducible (2PI) effective action of pure Yang-Mills theory can describe the classical field and particle production/propagation in a unified manner, and provides a first-principle approach to the thermalization process. For example, time-dependent and/or inhomogeneous classical background fields allow rapid particle production, such as 1 to 2 process on the basis of the 2PI formalism. We calculate the time evolution of the statistical function which contains some important features of particle distribution under the homogeneous, but time dependent color electromagnetic fields in the lowest order of perturbation theory. Our results suggest that parametric resonance causes exponential growth of the statisical function in low momentum regions. We will also discuss the role of background color magnetic fields in the instability of the statistical function and Nielsen-Olesen instability as an underlying mechanism.
On behalf of collaboration: None

Primary author

Shoichiro Tsutsui (Kyoto University)


Akira Ohnishi (Kyoto University) Hideaki Iida (Kyoto University) Teiji Kunihiro (Kyoto University)

Presentation Materials