TY - JOUR
T1 - Beyond the CMSSM without an accelerator
T2 - Proton decay and direct dark matter detection
AU - Ellis, John
AU - Evans, Jason L.
AU - Luo, Feng
AU - Nagata, Natsumi
AU - Olive, Keith A.
AU - Sandick, Pearl
N1 - Publisher Copyright:
© The Author(s) 2016.
PY - 2016
Y1 - 2016
N2 - 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 Min below the grand unification (GUT) scale MGUT, 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 Min is close to MGUT, but it may lie within its reach if Min ≲ 1011 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.
AB - 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 Min below the grand unification (GUT) scale MGUT, 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 Min is close to MGUT, but it may lie within its reach if Min ≲ 1011 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.
UR - http://www.scopus.com/inward/record.url?scp=84953714907&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84953714907&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-015-3842-6
DO - 10.1140/epjc/s10052-015-3842-6
M3 - Article
C2 - 26766922
AN - SCOPUS:84953714907
SN - 1434-6044
VL - 76
JO - European Physical Journal C
JF - European Physical Journal C
IS - 1
M1 - 8
ER -