Mini-Split

Abstract

The lack of evidence for new physics beyond the standard model at the LHC points to a paucity of new particles near the weak scale. This suggests that the weak scale is tuned and that supersymmetry, if present at all, is realized at higher energies. The measured Higgs mass constrains the scalar sparticles to be below 10^5 TeV, while gauge coupling unification favors Higgsinos below 100 TeV. Nevertheless, in many models gaugino masses are suppressed and remain within reach of the LHC. Tuning the weak scale and the renormalization group evolution of the scalar masses constrain Split model building. Due to the small gaugino masses, either the squarks or the up-higgs often run tachyonic; in the latter case, successful electroweak breaking requires heavy higgsinos near the scalar sparticles. We discuss the consequences of tuning the weak scale and the phenomenology of several models of Split supersymmetry including anomaly mediation, U(1)_(B-L) mediation, and Split gauge mediation.

26 pages, 12 figures; v2:discussion and figure on the status of fine-tuning in SUSY added, pheno section extended

References in corpus (17)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Dynamical SUSY Breaking in Meta-Stable Vacua
• The Well-Tempered Neutralino
• Notes on SUSY and R-Symmetry Breaking in Wess-Zumino Models
• Searches for heavy long-lived sleptons and R-Hadrons with the ATLAS detector in pp collisions at sqrt(s) = 7 TeV
• (Extra)Ordinary Gauge Mediation
• Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC
• Search for heavy long-lived charged particles in pp collisions at sqrt(s) = 7 TeV
• Search for direct top squark pair production in final states with one isolated lepton, jets, and missing transverse momentum in sqrt(s) = 7 TeV pp collisions using 4.7 fb-1 of ATLAS data
• Search for a supersymmetric partner to the top quark in final states with jets and missing transverse momentum at sqrt(s) = 7 TeV with the ATLAS detector
• Natural mu and Bmu in gauge mediation
• Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions
• Search for light scalar top quark pair production in final states with two leptons with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions
• Search for stopped long-lived particles produced in pp collisions at sqrt(s) = 7 TeV
• Excess Higgs Production in Neutralino Decays
• Lopsided Gauge Mediation

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