Use of Form-factors in Electromagnetic Interactions

Naus, H.W.L.; Koch, J.H.

doi:10.1103/PhysRevC.39.1907

Use of Form-factors in Electromagnetic Interactions

H.W.L. Naus
(
- NIKHEF, Amsterdam and
- Amsterdam U.
)
,
J.H. Koch
(
- NIKHEF, Amsterdam and
- Amsterdam U.
)

1989

7 pages

Published in:

Phys.Rev.C 39 (1989) 1907-1913

DOI:

10.1103/PhysRevC.39.1907

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Abstract: (APS)

We comment on the description of electromagnetic reactions involving hadrons, when the internal structure of the hadrons is taken into account. General off-shell vertex operators, only constrained by Lorentz and gauge invariance, are used. The electromagnetic production of pions on a nucleon is discussed as an example. Commonly used ad hoc recipes involving phenomenological form factors are discussed in the framework of an exact formulation.

ELECTROMAGNETIC INTERACTION
PHOTON NUCLEON: INTERACTION
INTERACTION: PHOTON NUCLEON
PI: ELECTROPRODUCTION
ELECTROPRODUCTION: PI
HADRON: FORM FACTOR
FORM FACTOR: HADRON
INVARIANCE: GAUGE
FEYNMAN GRAPH

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