Experimental aspects of SU(5)[times]U(1) supergravity

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.2164· OSTI ID:7272897

Lopez, J L; Nanopoulos, D V; Park, G T; Wang, X; Zichichi, A ^[1]

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1. Center for Theoretical Physics, Department of Physics, Texas A M University, College Station, Texas 77843-4242 (United States) Astroparticle Physics Group, Houston Advanced Research Center (HARC), The Mitchell Campus, The Woodlands, Texas 77381 (United States) CERN, Theory Division, 1211 Geneva 23 (Switzerland) CERN, 1211 Geneva 23 (Switzerland)

We study various aspects of SU(5)[times]U(1) supergravity as they relate to the experimental verification or falsification of this model. We consider two string-inspired, universal, one-parameter, no-scale soft-supersymmetry-breaking scenarios, driven by the [ital F] terms of the moduli and dilaton fields. The model is described in terms of the supersymmetry mass scale (i.e., the chargino mass [ital m][sub [chi]1][sup [plus minus]]), tan[beta], and the top-quark mass. We first determine the combined effect on the parameter space of all presently available direct and indirect experimental constraints, including the CERN LEP lower bounds on sparticle and Higgs-boson masses, the [ital b][r arrow][ital s][gamma] rate, the anomalous magnetic moment of the muon, the high-precision electroweak parameters [epsilon][sub 1],[epsilon][sub [ital b]] (which imply [ital m][sub [ital t]][approx lt]180 GeV), and the muon fluxes in underground detectors (neutrino telescopes). For the still-allowed points in ([ital m][sub [chi]1][sup [plus minus]],tan[beta]) parameter space, we reevaluate the experimental situation at the Fermilab Tevatron, LEP II, and DESY HERA. In the 1994 run, the Tevatron could probe chargino masses as high as 100 GeV. At LEP II the parameter space could be explored with probes of different resolutions: Higgs-boson searches, selectron searches, and chargino searches. Moreover, for [ital m][sub [ital t]][approx lt]150 GeV, these Higgs-boson searches could explore all of the allowed parameter space with [radical][ital s] [approx lt]210 GeV.

• DOE Contract Number: FG05-91ER40633
• OSTI ID: 7272897
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:3; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

661310 -- Relativity & Gravitation-- (1992-)
662210* -- Specific Theories & Interaction Models
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HIGGS BOSONS
LEPTONS
LIE GROUPS
MAGNETIC MOMENTS
MASS
MUONS
POSTULATED PARTICLES
Pa
Particle Systematics-- Unified Theories & Models-- (1992-)
SU GROUPS
SU-5 GROUPS
SUPERGRAVITY
SUPERSYMMETRY
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS
TOP PARTICLES
U GROUPS
U-1 GROUPS
UNIFIED-FIELD THEORIES