Transition magnetic moment of {Lambda}{yields}{Sigma}{sup 0} in QCD sum rules

Journal Article · Sun May 01 04:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.094008· OSTI ID:21541595

Lee, Frank X; Lai, Wang ^[1]

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1. Physics Department, The George Washington University, Washington, D.C. 20052 (United States)

The {Lambda}{yields}{Sigma}{sup 0} transition magnetic moment is computed in the QCD sum rules approach. Three independent tensor structures are derived in the external-field method using generalized interpolating fields. They are analyzed together with the {Lambda} and {Sigma}{sup 0} mass sum rules using a Monte-Carlo-based analysis, with attention to operator product expansion convergence, ground-state dominance, and the role of the transitions in the intermediate states. Relations between sum rules for magnetic moments of {Lambda} and {Sigma}{sup 0} and sum rules for transition magnetic moment of {Lambda}{yields}{Sigma}{sup 0} are also examined. Our best prediction for the transition magnetic moment is {mu}{sub {Sigma}}{sup 0}{sub {Lambda}=}1.60{+-}0.07{mu}{sub N}. A comparison is made with other calculations in the literature.

• OSTI ID: 21541595
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CALCULATION METHODS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CONVERGENCE
ELEMENTARY PARTICLES
EQUATIONS
EVALUATION
FERMIONS
FIELD THEORIES
FORECASTING
HADRONS
HYPERONS
LAMBDA BARYONS
LAMBDA PARTICLES
MAGNETIC MOMENTS
MASS
MONTE CARLO METHOD
OPERATOR PRODUCT EXPANSION
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SERIES EXPANSION
SIGMA BARYONS
SIGMA NEUTRAL PARTICLES
SIGMA PARTICLES
SIMULATION
STRANGE PARTICLES
SUM RULES