Moderate supersymmetric [ital CP] violation

It is well known that supersymmetry (SUSY) gives neutron and electron electric dipole moments ([ital d][sub [ital n]] and [ital d][sub [ital e]]) which are too large by about 10[sup 3]. If we assume a SUSY model cannot contain fine-tunings or large mass scales, then one must require that the SUSY-br...

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Bibliographic Details
Published in:Physical review. D, Particles and fields Particles and fields, 1994-05, Vol.49:9
Main Author: Garisto, R.
Format: Article
Language:English
Subjects:
662120 > General Theory of Particles & Fields-- Symmetry, Conservation Laws, Currents & Their Properties-- (1992-)
662210 > Specific Theories & Interaction Models
BARYONS
CP INVARIANCE
DIPOLE MOMENTS
ELECTRIC DIPOLE MOMENTS
ELECTRIC MOMENTS
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
INVARIANCE PRINCIPLES
KOBAYASHI-MASKAWA MATRIX
LEPTONS
MATRICES
NEUTRONS
NUCLEONS
Particle Systematics > Unified Theories & Models > (1992-)
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
POTENTIALS
SUPERSYMMETRY
SYMMETRY
SYMMETRY BREAKING
UNIFIED-FIELD THEORIES 662390 > Electromagnetic Processes & Properties-- (1992-)
VIOLATIONS
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Summary:It is well known that supersymmetry (SUSY) gives neutron and electron electric dipole moments ([ital d][sub [ital n]] and [ital d][sub [ital e]]) which are too large by about 10[sup 3]. If we assume a SUSY model cannot contain fine-tunings or large mass scales, then one must require that the SUSY-breaking mechanism give real soft breaking parameters, in which case the minimal SUSY model has no [ital CP] violation other than from the CKM matrix (aside from possible strong [ital CP]-violating effects). We show that in nonminimal SUSY models, a moderate amount of [ital CP] violation can be induced through one-loop corrections to the scalar potential, giving an effective phase of order 10[sup [minus]3], and thus implying [ital d][sub [ital n]] and [ital d][sub [ital e]] can be near their current experimental bounds [ital naturally]. This moderate amount of SUSY [ital CP] violation could also prove important for models of electroweak baryogenesis. We illustrate our results with a specific model.
ISSN:0556-2821
1089-4918
DOI:10.1103/PhysRevD.49.4820