  We perform an analytic calculation of the color fields in heavy-ion
collisions by considering the collision of longitudinally extended nuclei in
the dilute limit of the Color Glass Condensate effective field theory of
high-energy QCD. Based on general analytic expressions for the color fields in
the future light cone, we evaluate the rapidity profile of the transverse
pressure within a simple specific model of the nuclear collision geometry and
compare our results to 3+1D classical Yang-Mills simulations.
