Development of the relativistic impulse approximation

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5920665

Wallace, S J

This talk contains three parts. Part I reviews the developments which led to the relativistic impulse approximation for proton-nucleus scattering. In Part II, problems with the impulse approximation in its original form - principally the low energy problem - are discussed and traced to pionic contributions. Use of pseudovector covariants in place of pseudoscalar ones in the NN amplitude provides more satisfactory low energy results, however, the difference between pseudovector and pseudoscalar results is ambiguous in the sense that it is not controlled by NN data. Only with further theoretical input can the ambiguity be removed. Part III of the talk presents a new development of the relativistic impulse approximation which is the result of work done in the past year and a half in collaboration with J.A. Tjon. A complete NN amplitude representation is developed and a complete set of Lorentz invariant amplitudes are calculated based on a one-meson exchange model and appropriate integral equations. A meson theoretical basis for the important pair contributions to proton-nucleus scattering is established by the new developments. 28 references.

• Research Organization: Maryland Univ., College Park (USA). Dept. of Physics and Astronomy
• DOE Contract Number: AS05-76ER05126
• OSTI ID: 5920665
• Report Number(s): DOE/ER/05126-245; ORO-5126-245; CONF-850163-1; ON: DE85008505
• Country of Publication: United States
• Language: English

Related Subjects

651515 -- Nuclear Properties & Reactions
A=39-58
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
ANALYZING POWER
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
BEAMS
BOSON-EXCHANGE MODELS
CALCIUM 40 TARGET
CHARGED-PARTICLE REACTIONS
COUPLING
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
FIELD THEORIES
GENERAL RELATIVITY THEORY
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
IMPULSE APPROXIMATION
INTERACTIONS
INVARIANCE PRINCIPLES
LORENTZ INVARIANCE
MATHEMATICAL MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
NUCLEON-NUCLEON POTENTIAL
OBE MODEL
PARTICLE INTERACTIONS
PARTICLE MODELS
PERIPHERAL MODELS
POLARIZED BEAMS
POTENTIALS
PROTON REACTIONS
RELATIVITY THEORY
SCATTERING
SCATTERING AMPLITUDES
TARGETS