Pion form factor from a contact interaction

Abstract

In a Poincare'-covariant vector-boson-exchange theory, the pion possesses components of pseudovector origin, which materially influence its observable properties. For a range of such quantities, we explore the consequences of a momentum-independent interaction, regularised in a symmetry-preserving manner. The contact interaction, whilst capable of describing pion static properties, produces a form factor whose: evolution for Q^2>0.17GeV^2 disagrees markedly with experiment; and asymptotic power-law behaviour conflicts strongly with perturbative-QCD.

5 pages

References in corpus (3)

• Determination of the Charged Pion Form Factor at Q2=1.60 and 2.45 (GeV/c)2
• Sketching the Bethe-Salpeter kernel
• Hadron Properties and Dyson-Schwinger Equations

Cited by in corpus (5)

• Distribution Functions of the Nucleon and Pion in the Valence Region
• Abelian anomaly and neutral pion production
• pi- and rho-mesons, and their diquark partners, from a contact interaction
• Masses of ground and excited-state hadrons
• Impact of dynamical chiral symmetry breaking on meson structure and interactions