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Title: Chiral-symmetry breaking and confinement in Minkowski space

We present a model for the quark-antiquark interaction formulated in Minkowski space using the Covariant Spectator Theory. The quark propagators are dressed with the same kernel that describes the interaction between different quarks. By applying the axial-vector Ward-Takahashi identity we show that our model satisfies the Adler-zero constraint imposed by chiral symmetry. For this model, our Minkowski-space results of the dressed quark mass function are compared to lattice QCD data obtained in Euclidean space. The mass function is then used in the calculation of the electromagnetic pion form factor in relativistic impulse approximation, and the results are presented and compared with the experimental data from JLab.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6]
  1. Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico (IST), Universidade de Lisboa, 1049-001 Lisboa (Portugal)
  2. (IST), Universidadede Lisboa, 1049-001 Lisboa (Portugal)
  3. Centro de Física das Interações Fundamentais (CFIF), Instituto Superior Técnico (IST), Universidade de Lisboa, 1049-001 Lisboa (Portugal)
  4. Departamento de Física, Universidade de Évora, 7000-671 Évora (Portugal)
  5. (CFTP), Instituto Superior Técnico (IST), Universidade de Lisboa, 1049-001 Lisboa (Portugal)
  6. Thomas Jefferson National Accelerator Facility (JLab), Newport News, Virginia 23606 (United States)
Publication Date:
OSTI Identifier:
22499031
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1701; Journal Issue: 1; Conference: 11. conference on quark confinement and hadron spectrum, Saint Petersburg (Russian Federation), 8-12 Sep 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTIQUARKS; CEBAF ACCELERATOR; CHIRAL SYMMETRY; COMPARATIVE EVALUATIONS; CONFINEMENT; EUCLIDEAN SPACE; FORM FACTORS; IMPULSE APPROXIMATION; KERNELS; LIMITING VALUES; MASS; MINKOWSKI SPACE; PIONS; PROPAGATOR; QUANTUM CHROMODYNAMICS; QUARK-ANTIQUARK INTERACTIONS; RELATIVISTIC RANGE; SYMMETRY BREAKING; VECTORS