The quark--diquark model of the nucleon and properties of the Pomeron and odderon NN -scattering amplitudes in the Born approximation of QCD

Journal Article · Mon May 01 04:00:00 EDT 1989 · Soviet Journal of Nuclear Physics (English Translation); (USA)

OSTI ID:5286386

Zakharov, B G ^[1]

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1. Institute of Terrestrial Physics, USSR Academy of Sciences (SU)

The helicity-conserving and nonconserving {ital NN}-scattering amplitudes in Pomeron and odderon exchanges are calculated in the Born approximation of QCD for the nucleon modeled as a quark and a scalar {ital ud} diquark. The Pomeron amplitude is insensitive to the diquark size for small {vert bar}{ital t}{vert bar}. The odderon amplitude without spin-flip falls off with decreasing diquark radius. The contribution of odderon exchange to the ratio Re {ital T}/Im {ital T} for forward {ital pp} scattering is {similar to}0.02 for the symmetric nucleon and {similar to}0.005{endash}0.01 for the nucleon with a compact diquark of radius {similar to}0.2{endash}0.3 F. In the case of a compact diquark the contribution of Pomeron{endash}odderon interference to the polarization in {ital pp} scattering is {similar to}0.5{endash}1% at {vert bar}{ital t}{vert bar}{similar to}0.3 (GeV/{ital c}){sup 2}.

• OSTI ID: 5286386
• Journal Information: Soviet Journal of Nuclear Physics (English Translation); (USA), Journal Name: Soviet Journal of Nuclear Physics (English Translation); (USA) Vol. 49:5; ISSN 0038-5506; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BARYON-BARYON INTERACTIONS
BARYONS
BORN APPROXIMATION
BOSONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRON-HADRON INTERACTIONS
HADRONS
HELICITY
INTERACTIONS
MATHEMATICAL MODELS
MESONS
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
POMERANCHUK PARTICLES
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
SCATTERING AMPLITUDES
SPIN FLIP