Near field properties in relativistic heavy ion collisions

We study the properties of the soft gluon field produced in relativistic heavy ion collisions. In the spirit of McLerran-Venugopalan model, we write the field potential in a power series of the proper time $\tau$ and solve the Yang-Mills equation along with color current conservation equations simultaneously. We find that the classical gluon field at small $\tau$, i.e., the near field, is mainly longitudinal. We also calculate the energy-momentum tensor of the field. This gluon field will decay and thermalize into a quark gluon plasma. Our results can be used as the initial conditions for the consequent relativistic hydrodynamic description of the dense parton matter.