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Author Bosco, B. ♦ Kim, C. W. ♦ Mintz, S. L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NUCLEAR PHYSICS AND RADIATION PHYSICS ♦ CARBON 12 TARGET ♦ PHOTONUCLEAR REACTIONS ♦ LITHIUM 6 TARGET ♦ PHOTOPRODUCTION ♦ PIONS PLUS ♦ BORON 12 ♦ CROSS SECTIONS ♦ ENERGY-LEVEL TRANSITIONS ♦ FORM FACTORS ♦ GAUGE INVARIANCE ♦ HELIUM 6 ♦ MATRIX ELEMENTS ♦ PCAC THEORY ♦ SPIN ♦ ANGULAR MOMENTUM ♦ BASIC INTERACTIONS ♦ BETA DECAY RADIOISOTOPES ♦ BETA-MINUS DECAY RADIOISOTOPES ♦ BORON ISOTOPES ♦ BOSONS ♦ ELECTROMAGNETIC INTERACTIONS ♦ ELEMENTARY PARTICLES ♦ EVEN-EVEN NUCLEI ♦ HADRONS ♦ HELIUM ISOTOPES ♦ INTERACTIONS ♦ INVARIANCE PRINCIPLES ♦ ISOTOPES ♦ LIGHT NUCLEI ♦ MESONS ♦ NUCLEAR REACTIONS ♦ NUCLEI ♦ ODD-ODD NUCLEI ♦ PARTICLE PRODUCTION ♦ PARTICLE PROPERTIES ♦ PIONS ♦ PSEUDOSCALAR MESONS ♦ RADIOISOTOPES ♦ SECONDS LIVING RADIOISOTOPES ♦ TARGETS ♦ Nuclear Properties & Reactions, A=6-19, Theoretical- Nuclear Reactions & Scattering- (-1987)
Abstract The requirement of gauge invariance is applied to the matrix element for pion-photoproduction near threshold for spin 1/2/sup + -/..-->..1/2/sup + -/ and 0/sup + -/bold-arrow-left-right1/sup + -/ transitions and leads to relations between F/sub A/(..mu../sup 2/) and F/sub A/(-..mu../sup 2/), and to relations. These relations lead to theoretical predictions for cross sections consistent with experiment within the level of approximations made. Straightforward analytic continuation of the axial-vector form factor to the timelike region is also examined.
Educational Use Research
Learning Resource Type Article
Publisher Date 1982-04-01
Publisher Department Istituto di Fisica Teorica, Universita di Firenze, Firenze, Italy
Publisher Place United States
Journal Phys. Rev. C
Volume Number 25
Issue Number 4
Organization Istituto di Fisica Teorica, Universita di Firenze, Firenze, Italy


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