  According to the Color Glass Condensate approach to relativistic heavy-ion
collisions, the earliest phase of the collision is a glasma which is made of
highly populated gluon fields that can be treated classically. Using a proper
time expansion we study analytically various properties of the glasma. In
particular, we compute the glasma energy-momentum tensor which allows us to
obtain the energy density, longitudinal and transverse pressure, collective
flow, and angular momentum. We also study the role of the glasma in jet
quenching by computing collisional energy loss and transverse momentum
broadening.
