Electroweak matrix elements at large Nc: matching quarks to mesons

Abstract

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.

Comments: 12 pages, 2 figures. Invited talk given at ``The Phenomenology of Large-Nc QCD'', Arizona State U., January 9-11, 2002. A comment and a reference added