Pion form factor in the Kroll-Lee-Zumino model

Journal Article · Thu Nov 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.095002· OSTI ID:21032597

Dominguez, Cesareo A; Willers, Bernard ^[1]; Jottar, Juan I ^[2]; Loewe, Marcelo ^[2]

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1. Centre for Theoretical Physics and Astrophysics, University of Cape Town, Rondebosch 7700 (South Africa)
2. Facultad de Fisica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22 (Chile)

The renormalizable Abelian quantum field theory model of Kroll, Lee, and Zumino is used to compute the one-loop vertex corrections to the tree-level, vector meson dominance pion form factor. These corrections, together with the known one-loop vacuum polarization contribution, lead to a substantial improvement over vector meson dominance. The resulting pion form factor in the spacelike region is in excellent agreement with data in the whole range of accessible momentum transfers. The timelike form factor, known to reproduce the Gounaris-Sakurai formula at and near the rho-meson peak, is unaffected by the vertex correction at order O(g{sub {rho}}{sub {pi}}{sub {pi}}{sup 2})

• OSTI ID: 21032597
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRECTIONS
FORM FACTORS
MOMENTUM TRANSFER
PIONS
QUANTUM FIELD THEORY
RENORMALIZATION
RHO-770 MESONS
VACUUM POLARIZATION
VECTOR DOMINANCE MODEL