Damping rate of plasmons and photons in a degenerate nonrelativistic plasma

A calculation is presented of the plasmon and photon damping rates in a dense nonrelativistic plasma at zero temperature, following the resummation program of Braaten and Pisarski. At small soft momentum k, the damping is dominated by 3-->2 scattering processes corresponding to double longitudinal Landau damping. The dampings are proportional to (alpha/nu(F))(3/2) k(2)/m, where nu(F) is the Fermi velocity.