Abstract
We make a harmonic analysis of the pairing and damping contribution of a finite k range isotropic electron-phonon (or other boson) scattering in an anisotropic two-dimensional electronic system. We show that the pairing contribution of the anisotropic part of the electronic system can be much larger than its damping contribution enhancing significantly Tc. The higher is the order of the harmonic of the electronic anisotropy, the higher can be the asymmetry in its damping-pairing contribution. This could explain the puzzle of a much broader quasiparticle peak in the n-doped than in the p-doped cuprates, their smaller Tc's being also attributed to larger damping effects.