Unitarity Triangles and the Search for New Physics

Assuming that the Kobayashi-Maskawa mechanism gives the dom-inant contribution to CP violation at low energies, we propose a novel way of testing the flavour sector of the Standard Model which has the potencial for discovering New Physics. Using 3 × 3 unitarity of the V CKM matrix and choosing a complete set of rephasing invariant phases, we derive a set of exact relations in terms of measurable quantities, namely moduli of V CKM and arguments of rephasing invariant quartets. These tests complement the usual analysis in the ρ , η plane and, if there is New Physics, may reveal its source.