Determination of the magnetic moment by QCD sum rules

Journal Article · Tue Sep 01 04:00:00 EDT 1987 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.36.1442· OSTI ID:6146535

Pasupathy, J; Singh, J P; Wilson, S L; Chiu, C B

The magnetic moment of the hyperon is calculated using the QCD sum-rule approach of Ioffe and Smilga. It is shown that /sub / has the structure /sub / = (2/3(e/sub u/+e/sub d/+4e/sub s/)(eh-dash-bar/2M/sub /c)(1+delta/sub /), where delta/sub / is small. In deriving the sum rules special attention is paid to the strange-quark mass-dependent terms and to several additional terms not considered in earlier works. These terms are now appropriately incorporated. The sum rule is analyzed using the ratio method. Using the external-field-induced susceptibilities determined earlier, we find that the calculated value of /sub / is in agreement with experiment.

• Research Organization: Center for Theoretical Studies, Indian Institute of Science, Bangalore, India
• OSTI ID: 6146535
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 36:5; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
COLOR MODEL
COMPOSITE MODELS
CORRELATION FUNCTIONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FUNCTIONS
HADRONS
HYPERONS
LAMBDA PARTICLES
MAGNETIC FIELDS
MAGNETIC MOMENTS
MASS
MATHEMATICAL MODELS
PARTICLE MODELS
POSTULATED PARTICLES
PROPAGATOR
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUANTUM NUMBERS
QUARK MODEL
QUARKS
SPINORS
STRANGE PARTICLES
SUM RULES