Exotic particles below the TeV from low scale flavour theories

Details Exotic particles below the TeV from low scale flavour theories Exotic particles below the TeV from low scale flavour theories

2010-03-10

arxiv.org/abs/1003.2090v2

JHEP 1103:128,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, references added, one comment and one footnote added, results unchanged

Scientific paper

10.1007/JHEP03(2011)128

A flavour gauge theory is observable only if the symmetry is broken at relatively low energies. The intrinsic parity-violation of the fermion representations in a flavour theory describing quark, lepton and higgsino masses and mixings generically requires anomaly cancellation by new fermions. Benchmark supersymmetric flavour models are built and studied to argue that: i) the flavour symmetry breaking should be about three orders of magnitude above the higgsino mass, enough also to efficiently suppress FCNC and CP violations coming from higher-dimensional operators; ii) new fermions with exotic decays into lighter particles are typically required at scales of the order of the higgsino mass.

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