Initial fields and instability in the classical model of the heavy-ion collision

Understand

Color Glass Condensate (CGC) provides a classical description of dense gluon matter at high energies.

• Using the McLerran-Venugopalan (MV) model we calculate the initial energy density \epsilon(\tau) in the early stage of the relativistic nucleus-nucleus collision.
• Our analytical formula reproduces the quantitative results from lattice discretized simulations and leads to an estimate \epsilon(\tau=0.1fm)=40-50GeV/fm^3 in the Au-Au collision at RHIC energy.
• We then formulate instability with respect to soft fluctuations that violate boost invariance inherent to hard CGC backgrounds.