Relaxation of pion fields in nuclear matter
Galitskii V.M., Mishustin I.N.
We consider the behavior of a classical pion field in nuclear matter in the case when its initial value is not equal to the equilibrium value. Assuming that the principal dissipation mechanism is Landau damping, we obtain the time of relaxation of the pion field to the equilibrium value, which turns out to be much shorter than the collision time of heavy ions with energies of several hundred MeV per nucleon.