Effective description of quark mixing

Abstract

We use the effective Lagrangian formalism to describe quark mixing. The new W, Z and H couplings generalizing the CKM matrix and the GIM mechanism fulfil relations and inequalities which allow to discriminate among different SM extensions. As a by-product we give a useful parametrization of the generalized CKM matrix. We also show that the largest possible departures from the SM predictions result from heavy exotic fermions, which can induce, for example, top FCNC large enough to be observable at future colliders.

14 pages, 1 figure, reference updated, version to appear in Phys. Lett. B

References in corpus (2)

• Flavor Changing Effects in Theories with a Heavy Z' Boson with Family Non-Universal Couplings
• Flavor changing single top quark production channels at e^+e^- colliders in the effective Lagrangian description

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