Chiral-symmetry breaking and confinement in Minkowski space

Journal Article · Fri Jan 22 00:00:00 EST 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4938620· OSTI ID:22499031

Biernat, Elmar P. ^[1]; Peña, M. T. ^[1]; Ribeiro, J. E. ^[2]; Stadler, Alfred ^[3]; Gross, Franz ^[4]

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1. Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico (IST), Universidade de Lisboa, 1049-001 Lisboa (Portugal)
2. Centro de Física das Interações Fundamentais (CFIF), Instituto Superior Técnico (IST), Universidade de Lisboa, 1049-001 Lisboa (Portugal)
3. Departamento de Física, Universidade de Évora, 7000-671 Évora (Portugal)
4. Thomas Jefferson National Accelerator Facility (JLab), Newport News, Virginia 23606 (United States)

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.

• OSTI ID: 22499031
• Journal Information: AIP Conference Proceedings, Vol. 1701, 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); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

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