Nucleon Compton scattering in perturbative QCD

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.44.3445· OSTI ID:6095359

Kronfeld, A S ^[1]; Nizic, B ^[2]

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1. Theoretical Physics Group, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)
2. Rudjer Boskovic Institute, P.O. Box 1016, 41001 Zagreb, Croatia (Yugoslavia)

We have computed the helicity amplitudes for the reactions {gamma}{ital N}{r arrow}{gamma}{ital N} ({ital N}={ital p},{ital n}) at large momentum transfer to lowest order in perturbative QCD. Our cross section for proton Compton scattering shows good qualitative agreement with experimental data, when the proton is modeled by the Chernyak-Oglobin-Zhitnitsky, King-Sachrajda, or Gari-Stefanis distribution amplitude. Discrepancies between our results and previous calculations seem to be due to different treatments of numerical integration around singularities.

• OSTI ID: 6095359
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 44:11; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662340* -- Hadron Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BASIC INTERACTIONS
COMPTON EFFECT
CROSS SECTIONS
DIAGRAMS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
EQUATIONS
FEYNMAN DIAGRAM
FIELD THEORIES
INTERACTIONS
LIGHT CONE
MOMENTUM TRANSFER
PARTICLE INTERACTIONS
PERTURBATION THEORY
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PHOTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SCATTERING
SCATTERING AMPLITUDES
SPACE-TIME
SPINORS
SUM RULES