title: Beyond the CMSSM without an accelerator: proton decay and direct dark matter detection.
abstract: We consider two potential non-accelerator signatures of generalizations of the well-studied constrained minimal supersymmetric standard model (CMSSM). In one generalization, the universality constraints on soft supersymmetry-breaking parameters are applied at some input scale [Formula: see text]belowthe grand unification (GUT) scale [Formula: see text], a scenario referred to as 'sub-GUT'. The other generalization we consider is to retain GUT-scale universality for the squark and slepton masses, but to relax universality for the soft supersymmetry-breaking contributions to the masses of the Higgs doublets. As with other CMSSM-like models, the measured Higgs mass requires supersymmetric particle masses near or beyond the TeV scale. Because of these rather heavy sparticle masses, the embedding of these CMSSM-like models in a minimal SU(5) model of grand unification can yield a proton lifetime consistent with current experimental limits, and may be accessible in existing and future proton decay experiments. Another possible signature of these CMSSM-like models is direct detection of supersymmetric dark matter. The direct dark matter scattering rate is typically below the reach of the LUX-ZEPLIN (LZ) experiment if [Formula: see text] is close to [Formula: see text], but it may lie within its reach if [Formula: see text] GeV. Likewise, generalizing the CMSSM to allow non-universal supersymmetry-breaking contributions to the Higgs offers extensive possibilities for models within reach of the LZ experiment that have long proton lifetimes.
authors.affiliation: Theoretical Physics and Cosmology Group, Department of Physics, King's College London, Strand, London, WC2R 2LS UK ; TH Division, Physics Department, CERN, 1211 Geneva 23, Switzerland.
authors.forename: John
authors.initials: J
authors.lastname: Ellis
authors.affiliation: William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455 USA.
authors.forename: Jason L
authors.initials: JL
authors.lastname: Evans
authors.affiliation: TH Division, Physics Department, CERN, 1211 Geneva 23, Switzerland.
authors.forename: Feng
authors.initials: F
authors.lastname: Luo
authors.affiliation: William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455 USA ; Kavli IPMU (WPI), UTIAS, University of Tokyo, Kashiwa, Chiba 277-8583 Japan.
authors.forename: Natsumi
authors.initials: N
authors.lastname: Nagata
authors.affiliation: William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455 USA.
authors.forename: Keith A
authors.initials: KA
authors.lastname: Olive
authors.affiliation: Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112 USA.
authors.forename: Pearl
authors.initials: P
authors.lastname: Sandick