INFN - Laboratori Nazionali di Frascati, May 1995

From: The Second DAFNE Physics Handbook

Chapter 9: One Photon Initiated Processes

Eds. L. Maiani, G. Pancheri, N. Paver

Supported by the INFN, by the EC under the HCM contract number CHRX-CT920026 and by the authors home institutions.

Electromagnetic Form Factors

Grup de Física Teòrica, Universitat Autònoma de Barcelona,
08193 Bellaterra (Barcelona), Spain
and
Mario Greco

Universita' di Roma III and INFN, Laboratori Nazionali di Frascati,
Frascati, Italy. cm

Abstract:

A general introduction to electromagnetic form factors and hadron production in low-energy machines is discussed. Some global features of existing data are presented and simple, relevant models are briefly commented.

• 1 Elastic and transition form factors
  • 1.1 Elastic Form Factors
  • 1.2 Transition Form Factors
• 2 How many independent form factors?
  • 2.1 Elastic F.F. for spinless mesons
  • 2.2 Elastic F.F. for spin 1/2 baryons
  • 2.3 Transition F.F. for VP and
  • 2.4 Other form factors
• 3 Charge radii and slope parameters
  • 3.1 Charge radii
  • 3.2 Slope parameters
• 4 Pseudoscalar form factors
  • 4.1 Pion form factor
  • 4.2 Kaon F.F.
• 5 Nucleon form factors
• 6 and VP transition form factors
  • 6.1 VP transition F.F.
  • 6.2 transition F.F.
• 7 Models for form factors
  • 7.1 VMD for near the resonance region
  • 7.2 Models for F.F. near and charge radii
• References