Next-to-minimal supersymmetric model solution to the fine-tuning problem, precision electroweak constraints, and the largest CERN LEP Higgs event excess

Journal Article · Thu Nov 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.095006· OSTI ID:21032601

Dermisek, Radovan ^[1]; Gunion, John F ^[2]

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1. School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540 (United States)
2. Department of Physics, University of California at Davis, Davis, California 95616 (United States)

We present an extended study of how the next-to-minimal supersymmetric model easily avoids fine-tuning in electroweak symmetry breaking for a SM-like light Higgs with mass in the vicinity of 100 GeV, as beautifully consistent with precision electroweak data, while escaping LEP constraints due to the dominance of h{yields}aa decays with m{sub a}<2m{sub b} so that a{yields}{tau}{sup +}{tau}{sup -} or jets. The residual {approx}10% branching ratio for h{yields}bb explains perfectly the well-known LEP excess at m{sub h}{approx}100 GeV. Details of model parameter correlations and requirements are discussed as a function tan{beta}. Comparisons of fine-tuning in the NMSSM to that in the MSSM are presented. We also discuss fine-tuning associated with scenarios in which the a is essentially pure singlet, has mass m{sub a}>30 GeV, and decays primarily to {gamma}{gamma} leading to an h{yields}aa{yields}4{gamma} Higgs signal.

• OSTI ID: 21032601
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
BRANCHING RATIO
COMPARATIVE EVALUATIONS
CORRELATIONS
GEV RANGE
HIGGS BOSONS
HIGGS MODEL
LEP STORAGE RINGS
MATHEMATICAL SOLUTIONS
PHOTONS
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY BREAKING
TAU PARTICLES