Supersymmetric radiative flavour

Abstract

We examine possibilities for the radiative generation of the Yukawa couplings and flavour structure in supersymmetric models in the supersymmetric phase. Not withstanding the non-renormalisation of the Wilsonian superpotential, this can occur through the 2-loop vertex renormalisation of the physical 1PI couplings. We describe this effect and construct models in which this occurs. For models attempting to reproduce the full flavour structure of the Standard Model, we analyse the tension between such models and constraints from low-energy flavour observables. We note that the tension is weakest for the case of generating Dirac neutrino masses.

Split supersymmetry radiates flavor

“…For every entry listed, we include the same class of diagrams for its transpose. y 11 , y 12 , y 13 Gluino, gaugino-Higgsino y 22 , y 23 Flavino, flavon, gluino, y 33 Tree level 6 We also include the renormalization of u Appendix C, we find a set of parameters that reproduce the SM quark masses, CKM angles, and phase to within 5% of their values listed in [1] for the former and [82] for the latter. We list the contributions computed in Table V.…”

“…This framework not only explains the cascading down of the masses in different generations, but it can also easily be embedded into a UV theory where all SM fields are treated democratically so that different symmetry charges need not be given to the different fields. Supersymmetric theories of radiative flavor generation [22][23][24][25][26][27][28][29][30][31][32][33] can incorporate many of the usual advantages to supersymmetry (SUSY), including a natural dark matter candidate and improved gauge coupling unification. In the context of radiative flavor generation, SUSY has additional advantages.…”