The q over arrow pointing right = 0 phonon self-energy is calculated a
nd related to changes in Raman phonon widths and shifts upons entering
the superconducting state. Results are presented for different order
parameter symmetry: s-wave, planar d-wave, and an anisotropic order pa
rameter pertinent to a model of a layered superconductor. Comparison i
s made with results of Raman and infrared experiments on RBa2Cu3O7 com
pounds.