Fermion masses and symmetry breaking of a U(2) flavour symmetry

Riccardo Barbieri , Leonardo Giusti , Lawrence J. Hall , Andrea Romanino

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classification ✦ hep-ph

keywords symmetrybreakingfermionflavourautomaticallybreaksbroaddetermining

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We show how a specific sequential breaking pattern of a U(2) flavour symmetry occurs automatically in a broad framework. The relative orientation in U(2) space of the spurion fields that breaks the U(2) symmetry is uniquely fixed, thus determining the form of the fermion mass matrices in a predictive way.

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Fermion masses and symmetry breaking of a U(2) flavour symmetry

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