Predicted properties of Delbrueck scattering for photon energies up to 10/sup 4/ MeV

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

DOI:https://doi.org/10.1103/PhysRevD.36.733· OSTI ID:6054682

Rullhusen, P; Trube, J; Baumann, A; Rose, K W; Smend, F; Schumacher, a M

Using an exact numerical evaluation of the lowest-order Feynman graphs and the impact-factor approximation of Cheng and Wu for the lowest-order as well as the multiphoton-exchange Feynman graphs, properties of Delbrueck scattering are investigated at energies between 1 and 10/sup 4/ MeV. The predicted scaling behavior starts showing up above about 100 MeV, i.e., at much higher energies than previously anticipated. At angles below 30/sup 0/ the amplitudes are predominantly imaginary and are modified by multiphoton exchange by factors of 2 to 4. At angles above 90/sup 0/ real and imaginary parts are of the same magnitude at all energies. Discrepancies observed between the predictions of the exact numerical evaluation of the lowest-order Feynman graphs and the impact-factor approximation to the lowest-order amplitudes make a reinvestigation of computational methods for the Coulomb-correction effect highly desirable.

• Research Organization: II. Physikalisches Institut der Universitt Goettingen, D-3400 Goettingen, Federal Republic of Germany
• OSTI ID: 6054682
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 36:3; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645201* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- General & Scattering Theory
645202 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANGULAR DISTRIBUTION
BORN APPROXIMATION
COULOMB FIELD
DELBRUECK SCATTERING
DIAGRAMS
DISTRIBUTION
ELASTIC SCATTERING
ELECTRIC FIELDS
ELECTRODYNAMICS
ENERGY RANGE
FEYNMAN DIAGRAM
FIELD THEORIES
GAUGE INVARIANCE
HELICITY
INELASTIC SCATTERING
INVARIANCE PRINCIPLES
MATHEMATICS
MEV RANGE
MONTE CARLO METHOD
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUMERICAL ANALYSIS
PARTICLE PROPERTIES
PHOTONUCLEAR REACTIONS
PROPAGATOR
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
SCALING LAWS
SCATTERING
SCATTERING AMPLITUDES
VACUUM POLARIZATION