Abstract
We show that the predictivity of general gauge mediation (GGM) with TeV-scale stops is greatly increased once the Higgs mass constraint is imposed. The most notable results are a strong lower bound on the mass of the gluino and right-handed squarks, and an upper bound on the Higgsino mass. If the μ-parameter is positive, the wino mass is also bounded from above. These constraints relax significantly for high messenger scales and as such long-lived NLSPs are favored in GGM. We identify a small set of most promising topologies for the neutralino/sneutrino NLSP scenarios and estimate the impact of the current bounds and the sensitivity of the high luminosity LHC. The stau, stop and sbottom NLSP scenarios can be robustly excluded at the high luminosity LHC.
Highlights
We show that the predictivity of general gauge mediation (GGM) with TeVscale stops is greatly increased once the Higgs mass constraint is imposed
This makes full phenomenological surveys of UV motivated scenarios complementary to the bottom up approach based on the full coverage of SUSY decay topologies in terms of simplified models [39, 40]. (For simplified models specific to gauge mediation, see [41,42,43,44,45,46,47,48,49].) For instance we will see how the GGM parameter space, with the Higgs mass accounted for, features strong correlations in the spectrum which single out a small set of promising decay topologies
This framework goes by the name of “General Gauge Mediation” (GGM) [13, 14] and includes all models where the SM gauge interactions are the only source of communication between the supersymmetry breaking sector and the MSSM
Summary
The defining feature of gauge mediation models is that supersymmetry breaking is communicated via a messenger sector to the MSSM by heavy “messenger” states which are charged under the SM gauge interactions. Without specifying the nature of the messengers sector, it was shown in [13] that all gauge mediation models can be captured in a single, very predictive equivalence class This framework goes by the name of “General Gauge Mediation” (GGM) [13, 14] and includes all models where the SM gauge interactions are the only source of communication between the supersymmetry breaking sector and the MSSM. In this paper we focus on NLSP masses around or below the TeV scale (within the reach of LHC) and we take two benchmark datasets for high and low messenger scale gauge mediation, with respectively Mmess = 1015 GeV and Mmess = 107 GeV In the former case, we assume that Planck-suppressed contributions from gravity mediation are small compared to those from the gauge mediation sector. In the former case, we assume that Planck-suppressed contributions from gravity mediation are small compared to those from the gauge mediation sector. (For a discussion of gauge-gravity hybrid models, see for instance [64, 65].) As we will see, the phenomenology of these two benchmarks differs greatly
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