ELECTROMAGNETIC EFFECTS IN MESON THEORY
The dominant part of phenomena involving pi mesons and nucleons is charge independent. In view of such observed deviations from the law of isotopic spin conservation as the proton-neutron mass difference, the chargedneutral meson mass difference, and more recently observed discrepancies in the dispersion relations for meson scattering, it is desirable to investigate the effects of the electromagnetic interaction in an otherwise charge independent meson theory. A method is developed for taking the derivative of the scattering matrix with respect to the electric charge. This leads to an expression for the proton- neutron mass difference in terms of certain Heisenberg matrix elements, some of which can be evaluated from independent experimental data. Those which can be evaluated glve a mass difference of about the right magnitude but the wrong sign. A modification of the method is used in the static-nucleon theory to investigate the electromagnetic effects in meson-nucleon scattering. The effects are not negligible and should be considered in making an analysis of the scattering data.
- Research Organization:
- Carnegie Inst. of Tech., Pittsburgh
- DOE Contract Number:
- AT(30-1)-882
- NSA Number:
- NSA-12-016000
- OSTI ID:
- 4301589
- Report Number(s):
- NYO-7119
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-58
- Country of Publication:
- United States
- Language:
- English
Similar Records
ELECTROMAGNETIC CORRECTIONS TO WEAK INTERACTIONS. THE BETA DECAYS OF THE MUON, NEUTRON, AND O$sup 1$$sup 4$
Meson exchange currents in neutron-proton bremsstrahlung
Related Subjects
DISPERSION RELATIONS- ELECTRIC CHARGES- ELECTROMAGNETIC FIELDS- ELEMENTARY PARTICLES- FIELD THEORY- ISOSPIN- MASS- PARTICLE MODELS- PIONS- QUANTUM MECHANICS- SCATTERING- SCATTERING AMPLITUDE
ELECTRIC CHARGES- ELECTROMAGNETIC FIELDS- MASS- MATRICES- NEUTRONS- PIONS- PROTONS- SCATTERING
ELECTRIC CHARGES- ELECTROMAGNETIC FIELDS- MASS- MESONS- NUCLEONS- PIONS- SCATTERING