Process-independent radiative corrections in the minimal supersymmetric standard model

Journal Article · Sat Feb 29 23:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.1725· OSTI ID:7235301

Drees, M ^[1]; Hagiwara, K ^[2]; Yamada, A ^[3]

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1. Theory Group, DESY, Hamburg 52 (Germany)
2. Department of Physics, University of Durham, Durham DH1 3LE (United Kingdom) Theory Group, KEK, Tsukuba, Ibaraki 305 (Japan)
3. Institute of Physics, University of Tokyo-Komaba, Komaba, Tokyo 158 (Japan)

We systematically study supersymmetric corrections to the two-point functions of the electroweak gauge bosons. These corrections are process independent in the sense that they affect all electroweak gauge interactions. We present our results for three relevant physical quantities: the {rho} parameter, the mass of the {ital W} boson, and the effective parameter sin{sup 2}{cflx {theta}}{sub {ital W}}(1+{delta}{cflx {kappa}}) that measures the strength of vector couplings of the {ital Z}. We find that in models with general softly broken supersymmetry corrections due to supersymmetric particles can be quite sizable; they can compensate a decrease of {ital m}{sub {ital t}} of 60 GeV. Because of dynamical threshold enhancement, their effect on {ital m}{sub {ital W}} and sin{sup 2}{cflx {theta}}{sub {ital W}}(1+{delta}{cflx {kappa}}) can be even bigger if some sparticle mass is close to {ital m}{sub {ital Z}}/2. We also study correlations between the three observables; these correlations are very strong in the standard model, but can be substantially weaker in supersymmetric models if some sparticle masses lie below 80--100 GeV. Finally, we discuss supergravity models with radiative gauge symmetry breaking; we find that the maximal corrections in these models are reduced by roughly 40--50 % compared to the case of general softly broken supersymmetry.

• OSTI ID: 7235301
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 45:5; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120* -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662210 -- Specific Theories & Interaction Models
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CORRECTIONS
ELEMENTARY PARTICLES
FIELD THEORIES
GRAND UNIFIED THEORY
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LIE GROUPS
MASS
MATHEMATICAL MODELS
PARTICLE MODELS
PROPAGATOR
Pa
Particle Systematics-- Unified Theories & Models-- (1992-)
RADIATIVE CORRECTIONS
STANDARD MODEL
SU GROUPS
SU-2 GROUPS
SUPERGRAVITY
SUPERSYMMETRY
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
VACUUM POLARIZATION
W MINUS BOSONS
W PLUS BOSONS
WEINBERG ANGLE
WEINBERG-SALAM GAUGE MODEL
Z NEUTRAL BOSONS