Study of early time attractor with longitudinal forces with Bjorken symmetry

We study the effect of external proper time-dependent longitudinal forces on the evolution of the distribution function using the Boltzmann equation with a relaxation time collision kernel under Bjorken flow. We derive an exact solution and study the early time attractor behavior of different components of energy-momentum tensor under Bjorken symmetry. We show that the arbitrary initial data approaches the attractor solution but is influenced by the external force with slightly broken Bjorken symmetry.