Supersymmetric fine-tuning problem and TeV-scale exotic scalars

Journal Article · Fri Jul 01 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.015006· OSTI ID:20711073

Nomura, Yasunori; Tweedie, Brock ^[1]

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1. Department of Physics, University of California, Berkeley, California 94720, USA and Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

A general framework is presented for supersymmetric theories that do not suffer from fine-tuning in electroweak symmetry breaking. Supersymmetry is dynamically broken at a scale {lambda}{approx_equal}(10-100) TeV, which is transmitted to the supersymmetric standard model sector through standard model gauge interactions. The dynamical supersymmetry-breaking sector possesses an approximate global SU(5) symmetry, whose SU(3)xSU(2)xU(1) subgroup is explicitly gauged and identified as the standard model gauge group. This SU(5) symmetry is dynamically broken at the scale {lambda}, leading to pseudo-Goldstone boson states, which we call xyons. We perform a detailed estimate for the xyon mass and find that it is naturally in the multi-TeV region. We study general properties of xyons, including their lifetime, and study their collider signatures. A generic signature is highly ionizing tracks caused by stable charged bound states of xyons, which may be observed at the CERN LHC. We also consider cosmology in our scenario and find that a consistent picture can be obtained. Our framework is general and does not depend on the detailed structure of the Higgs sector, nor on the mechanism of gaugino-mass generation.

• OSTI ID: 20711073
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOUND STATE
CERN LHC
COSMOLOGY
GAUGE INVARIANCE
GOLDSTONE BOSONS
HIGGS BOSONS
HIGGS MODEL
LIFETIME
PARTICLE TRACKS
SCALARS
SPARTICLES
STANDARD MODEL
SU-2 GROUPS
SU-3 GROUPS
SU-5 GROUPS
SUPERSYMMETRY
SYMMETRY BREAKING
TEV RANGE
UNITARY SYMMETRY