Eur. Phys. J. C (2016) 76: 562
https://doi.org/10.1140/epjc/s10052-016-4398-9

Regular Article - Theoretical Physics

Maximal sfermion flavour violation in super-GUTs

¹ Theoretical Particle Physics and Cosmology Group, Department of Physics, King’s College London, London, WC2R 2LS, UK
² Theoretical Physics Department, CERN, 1211 23, Geneva, Switzerland
³ William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA
⁴ Department of Physics and Technology, University of Bergen, PO Box 7803, 5020, Bergen, Norway

^* e-mail: Liliana.Velasco-Sevilla@uib.no

Received: 23 May 2016
Accepted: 25 September 2016
Published online: 20 October 2016

Abstract

We consider supersymmetric grand unified theories with soft supersymmetry-breaking scalar masses specified above the GUT scale (super-GUTs) and patterns of Yukawa couplings motivated by upper limits on flavour-changing interactions beyond the Standard Model. If the scalar masses are smaller than the gaugino masses , as is expected in no-scale models, the dominant effects of renormalisation between the input scale and the GUT scale are generally expected to be those due to the gauge couplings, which are proportional to and generation independent. In this case, the input scalar masses may violate flavour maximally, a scenario we call MaxSFV, and there is no supersymmetric flavour problem. We illustrate this possibility within various specific super-GUT scenarios that are deformations of no-scale gravity.