ONE-LOOP RESULT FOR THE BOGOLIUBOV-ANDERSON MODE OF THE SUPERCONDUCTING STRONG-COUPLING ATTRACTIVE HUBBARD-MODEL

We present the one-loop calculations for the sound-like Bogoliubov-And erson mode in the superconducting phase of the attractive Hubbard mode l in the strong coupling limit. It is found that in the leading dimens ional singularities and for low temperatures the zero-loop expression is modified only by a global correction factor; as a consequence the d ispersion relation and the Bogoliubov velocity retain their zero-loop results.