2011/05/12 by F. Brümmer, W. Buchmüller · 14 citations
Physics and Astronomy · #Gauge (firearms) #Hidden sector #Minimal Supersymmetric Standard Model #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #Supergravity #Superpartner #Supersymmetry #Supersymmetry breaking #Unification #hep-ph
paper · pdf · doi:10.1007/jhep07(2011)010
published in Journal of High Energy Physics 2011(7) (Springer Nature) · 21 pages, 2 figures; v2: reference added
arxiv created 2011/05/12 · openalex publication_date 2011/07/01 · arxiv updated 2015/05/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Grand-unified models with extra dimensions at the GUT scale will typically contain exotic states with Standard Model charges and GUT-scale masses. They can act as messengers for gauge-mediated supersymmetry breaking. If the number of messengers is sizeable, soft terms for the visible sector fields will be predominantly generated by gauge mediation, while gravity mediation can induce a small μ parameter. We illustrate this hybrid mediation pattern with two examples, in which the superpartner spectrum contains light and near-degenerate higgsinos with masses below 200 GeV. The typical masses of all other superpartners are much larger, from at least 500 GeV up to several TeV. The lightest superparticle is the gravitino, which may be the dominant component of dark matter.