English

Simply Unnatural Supersymmetry

High Energy Physics - Phenomenology 2013-01-01 v1

Abstract

The current measurement of the Higgs mass, the ubiquitous nature of loop-suppressed gaugino masses in gravity-mediated supersymmetry breaking, relic dark matter density from \sim TeV mass gauginos, together with the success of supersymmetric gauge coupling unification, suggest that scalar superpartner masses are roughly mscm_{sc} \sim 100-1000 TeV. Higgsino masses, if not at the Planck scale, should generically appear at the same scale. The gaugino mass contributions from anomaly mediation, with the heavy Higgsino threshold, generally leads to a more compressed spectrum than standard anomaly mediation, while the presence of extra vector-like matter near mscm_{sc} typically leads to an even more compressed spectrum. Heavy Higgsinos improve gauge coupling unification relative to the MSSM. Heavy scalars suggest new possibilities for flavor physics -- large flavor violations in the soft masses are now allowed, yielding interesting levels for new FCNC's, and re-opening the attractive possibility of a radiatively generated fermion mass hierarchy. Gluinos and binos/winos must decay through higher dimension operators, giving a unique handle on the presence of new physics the scale mscm_{sc}. Gluino decays should be spectacular, for example yielding events with four tops -- at modestly displaced vertices -- and two Higgses plus missing energy. The high scale mscm_{sc} can also be probed in flavor-violating gluino decays, as well as a specific pattern of gluino branching ratios to the third generation. Finally, with heavy Higgsinos, the dominant decay for neutral winos and binos proceeds via the Higgs b~w~h\tilde b \to \tilde w h. The heaviness of the Higgsinos can be inferred from the branching ratio for the rare decay b~w~Z\tilde b \to \tilde w Z.

Keywords

Cite

@article{arxiv.1212.6971,
  title  = {Simply Unnatural Supersymmetry},
  author = {Nima Arkani-Hamed and Arpit Gupta and David E. Kaplan and Neal Weiner and Tom Zorawski},
  journal= {arXiv preprint arXiv:1212.6971},
  year   = {2013}
}
R2 v1 2026-06-21T23:02:23.969Z