1208.5320 (Aiichi Iwazaki)

Anomalous Gluon Production and Condensation in Glasma    [PDF]

Aiichi Iwazaki

The collinear color electric and magnetic fields have been discussed to be produced immediately after high energy heavy ion collisions. We discuss anomalous gluon production under the background gauge fields. The gluons are Nielsen-Olesen unstable modes. The production rate of the modes by Schwinger mechanism has recently been found to be anomalously larger than the rate of quarks or other stable gluons. Analyzing classical evolutions of the modes with initial conditions given by vacuum fluctuations, we find that their production makes the color electric field decay very rapidly. The life time of the field is approximately given by the inverse of saturation momentum in the collisions. We discuss a possibility that the mode with zero momentum form a Bose condensate and its gluon number density grows to be of the order of $1/\alpha_g$. The condensate would melts into quark gluon plasma after the gluon number density grows sufficiently large for nonlinear interactions to be operative.

View original: http://arxiv.org/abs/1208.5320