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Title: MSSM from Scherk-Schwarz supersymmetry breaking

Abstract

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.

Authors:
 [1];  [2];  [3]
  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)
Publication Date:
OSTI Identifier:
20871137
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 74; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.74.055004; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Diego, D, Gersdorff, G v, and Quiros, M. MSSM from Scherk-Schwarz supersymmetry breaking. United States: N. p., 2006. Web. doi:10.1103/PHYSREVD.74.055004.
Diego, D, Gersdorff, G v, & Quiros, M. MSSM from Scherk-Schwarz supersymmetry breaking. United States. doi:10.1103/PHYSREVD.74.055004.
Diego, D, Gersdorff, G v, and Quiros, M. Fri . "MSSM from Scherk-Schwarz supersymmetry breaking". United States. doi:10.1103/PHYSREVD.74.055004.
@article{osti_20871137,
title = {MSSM from Scherk-Schwarz supersymmetry breaking},
author = {Diego, D and Gersdorff, G v and Quiros, M},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.74.055004},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 5,
volume = 74,
place = {United States},
year = {2006},
month = {9}
}