Pion electromagnetic form factor in the covariant spectator theory

Elmar P. Biernat, Franz Gross, M. T. Peña, and Alfred Stadler
Phys. Rev. D 89, 016006 – Published 6 January 2014

Abstract

The pion electromagnetic form factor at spacelike momentum transfer is calculated in relativistic impulse approximation using the covariant spectator theory. The same dressed quark mass function and the equation for the pion bound-state vertex function as discussed in the companion paper are used for the calculation, together with a dressed quark current that satisfies the Ward-Takahashi identity. The results obtained for the pion form factor are in agreement with experimental data, they exhibit the typical monopole behavior at high-momentum transfer, and they satisfy some remarkable scaling relations.

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  • Received 29 October 2013

DOI:https://doi.org/10.1103/PhysRevD.89.016006

© 2014 American Physical Society

Authors & Affiliations

Elmar P. Biernat1,*, Franz Gross2,†, M. T. Peña1,‡, and Alfred Stadler3,§

  • 1Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico (IST), Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
  • 2Thomas Jefferson National Accelerator Facility (JLab), Newport News, Virginia 23606, USA
  • 3Departamento de Física da Universidade de Évora, 7000-671 Évora, Portugal and Centro de Física Nuclear da Universidade de Lisboa (CFNUL), 1649-003 Lisboa, Portugal

  • *elmar.biernat@tecnico.ulisboa.pt
  • gross@jlab.org
  • teresa.pena@tecnico.ulisboa.pt
  • §stadler@uevora.pt

See Also

Confinement, quark mass functions, and spontaneous chiral symmetry breaking in Minkowski space

Elmar P. Biernat, Franz Gross, M. T. Peña, and Alfred Stadler
Phys. Rev. D 89, 016005 (2014)

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Vol. 89, Iss. 1 — 1 January 2014

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