Constraints on baryon-nonconserving Yukawa couplings in a supersymmetric theory

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

DOI:https://doi.org/10.1103/PhysRevD.50.R39· OSTI ID:7233450

Brahmachari, B ^[1]; Roy, P ^[2]

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1. Theory Group, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009 (India)
2. Theoretical Physics Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay 400 005 (India)

The one-loop evolution of couplings in the minimal supersymmetric standard model, extended to include baryon nonconserving ([ital ];sB) operators through explicit [ital R]-parity violation, is considered keeping only [ital ];sB superpotential terms involving the maximum possible number of third generation superfields. If all retained Yukawa couplings [ital Y][sub [ital i]] are required to remain in the perturbative domain ([ital Y][sub [ital i]][lt]1) up to the scale of gauge group unification, upper bounds ensue on the magnitudes of the [ital ];sB coupling strengths at the supersymmetry-breaking scale, independent of the model of unification. They turn out to be similar to the corresponding fixed point values reached from a wide range of [ital Y][sub [ital i]] (including all [ital Y][sub [ital i]] greater than unity) at the unification scale. The coupled evolution of the top quark and [ital ];sB Yukawa couplings results in a reduction of the fixed point value of the former.

• OSTI ID: 7233450
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:1; ISSN 0556-2821; ISSN PRVDAQ
• Country of Publication: United States
• Language: English

Related Subjects

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662210* -- Specific Theories & Interaction Models
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON NUMBER
CONSERVATION LAWS
COUPLING
GAUGE INVARIANCE
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
NUCLEAR POTENTIAL
PARITY
PARTICLE MODELS
PARTICLE PROPERTIES
POTENTIALS
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Particle Systematics-- Unified Theories & Models-- (1992-)
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY
SYMMETRY BREAKING
UNIFIED GAUGE MODELS
YUKAWA POTENTIAL