English

RGE Behaviour of SUSY with a U(2)^3 symmetry

High Energy Physics - Phenomenology 2015-06-11 v2

Abstract

The first LHC results seem to disfavour, from the point of view of naturalness, any constrained MSSM realization with universal conditions at the SUSY-breaking scale. A more motivated scenario is given by split-family SUSY, in which the first two generations of squarks are heavy, compatible with a U(2)^3 flavour symmetry. We consider this flavour symmetry to be broken at a very high scale and study the consequences at low energies through its RGE evolution. Initial conditions compatible with a split scenario are found, and the preservation of correlations from minimal U(2)^3 breaking are checked. The various chiral operators in ΔF=2\Delta F=2 processes are analyzed, and we show that, due to LHC gluino bounds, the (LL)(RR) operators can not always be neglected. Finally, we also study a possible extension of the U(2)^3 model compatible with the lepton sector.

Keywords

Cite

@article{arxiv.1210.4561,
  title  = {RGE Behaviour of SUSY with a U(2)^3 symmetry},
  author = {Gianluca Blankenburg and Joel Jones-Perez},
  journal= {arXiv preprint arXiv:1210.4561},
  year   = {2015}
}

Comments

22 pages, 9 Figures; v2: minor corrections, improved discussion on (LL)(RR) operators, main results unchanged