MSSM from Scherk-Schwarz supersymmetry breaking

Journal Article · Fri Sep 01 04:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.055004· OSTI ID:20871137

Diego, D ^[1]; Gersdorff, G v ^[2]; Quiros, M ^[3]

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1. Theoretical Physics Group, IFAE, E-08193 Bellaterra, Barcelona (Spain)
2. Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218 (United States)
3. Institucio Catalana de Recerca i Estudis Avancats (ICREA) (Spain)

We present a five-dimensional model compactified on an interval where supersymmetry is broken by the Scherk-Schwarz mechanism. The gauge sector propagates in the bulk, two Higgs hypermultiplets are quasilocalized, and quark and lepton multiplets localized, in one of the boundaries. The effective four-dimensional theory is the MSSM with very heavy gauginos, heavy squarks, and light sleptons and Higgsinos. The soft tree-level squared masses of the Higgs sector can be negative and they can (partially) cancel the positive one-loop contributions from the gauge sector. Electroweak symmetry breaking can then comfortably be triggered by two-loop radiative corrections from the top-stop sector. The fine-tuning required to obtain the electroweak scale is found to be much smaller than in the MSSM, with essentially no fine-tuning for few TeV gaugino masses. All bounds from direct Higgs searches at LEP and from electroweak precision observables can be satisfied. The lightest supersymmetric particle is a (Higgsino-like) neutralino that can accommodate the abundance of dark matter consistently with recent Wilkinson Microwave Anisotropy Probe (WMAP) observations.

• OSTI ID: 20871137
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 74; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
ANISOTROPY
COMPACTIFICATION
HIGGS BOSONS
HIGGS MODEL
LEP STORAGE RINGS
LEPTONS
MULTIPLETS
NONLUMINOUS MATTER
QUARKS
RADIATIVE CORRECTIONS
RELICT RADIATION
REST MASS
SPARTICLES
SUPERSYMMETRY
SYMMETRY BREAKING
TEV RANGE