Quark-Hadron Duality

Abstract

In Chap. 1 we discussed how flavour physics is an ideal testing ground for searches for new physics, as there are many observables which are highly suppressed in the SM but could easily be enhanced by new physics, as well as many observables for which a high experimental precision is available—meson mixing observables satisfy both these criteria. In order to make use of this fact, we must be sure that hadronic uncertainties are under control in our theoretical calculations, as otherwise we cannot tell for certain if we are seeing anything new.