Long-distance contributions in $ K \to \pi l^+ l^-$ Decays
  This talk gives a short summary of some work \cite{FGEdeR04} realized in collaboration with E. de Rafael and concerning $K\ra\pi \ell^+ \ell^-$ decays, in a combined framework of Chiral Perturbation Theory and Large--$N\_c$ QCD under the dominance of a minimal narrow resonance structure. 
Samuel Friot (CPT, LM-Orsay), David Greynat (CPT)