Electroweak matrix elements at large Nc: matching quarks to mesons
  I review some progress made on the problem of calculating electroweak processes of mesons at low energy with the use of an approximation to large-Nc QCD which we call the Minimal Hadronic Approximation. An update of results for the matrix elements of the electroweak penguin operators Q7 and Q8 is also given. 
S. Peris (UAB and IFAE, Barcelona)