Equation of motion of a classical scalar field with back reaction of produced particles

摘要

In the one-loop approximation we derive the equation of motion for a classical scalar field #psi#_c(t) with the back reaction of particle production included. The equation is non-local in time, but can easily be treated perturbatively or numerically. for the weak trilinear coupling of the external field to the produced particles, the new equation gives the same solution as the familiar one with the #UPSILON##ntic fields are created in electroweak two bubble collisions.#p.314-318#QTY##??mmetry in baryon number generated by this scenario is smaller than the observed value by at least 10 orders of magnitude.#p.304-308