Theoretical implications of the CERN LEP Higgs search

Journal Article · Tue Feb 01 04:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.035006· OSTI ID:20705959

Kane, G L; Wang, Ting T; Nelson, Brent D; Wang, L -T ^[1]

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1. Michigan Center for Theoretical Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States)

We study the implications for the minimal supersymmetric standard model (MSSM) of the absence of a direct discovery of a Higgs boson at LEP. First we exhibit 15 physically different ways in which one or more Higgs bosons lighter than the LEP limit could still exist. For each of these cases - as well as the case that the lightest Higgs eigenstate is at, or slightly above, the current LEP limit - we provide explicit sample configurations of the Higgs sector as well as the soft supersymmetry breaking Lagrangian parameters necessary to generate these outcomes. We argue that all of the cases seem fine-tuned, with the least fine-tuned outcome being that with m{sub h}{approx_equal}115 GeV. Seeking to minimize this tuning we investigate ways in which the 'maximal-mixing' scenario with large top-quark trilinear A-term can be obtained from simple string-inspired supergravity models. We find these obvious approaches lead to heavy gauginos and/or problematic low-energy phenomenology with minimal improvement in fine-tuning.

• OSTI ID: 20705959
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
EIGENFUNCTIONS
EIGENSTATES
EIGENVALUES
GEV RANGE
HIGGS BOSONS
HIGGS MODEL
INTERMEDIATE BOSONS
LAGRANGIAN FIELD THEORY
LAGRANGIAN FUNCTION
LEP STORAGE RINGS
PARTICLE IDENTIFICATION
REST MASS
STANDARD MODEL
SUPERGRAVITY
SUPERSYMMETRY
SYMMETRY BREAKING
T QUARKS