Chiral symmetry breaking and Schwinger-Dyson equations

• Grant number: 05/04066-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: March 01, 2006
• End date: December 31, 2006
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Adriano Antonio Natale
• Grantee: Arlene Cristina Aguilar
• Host Institution: Instituto de Física Teórica (IFT). Universidade Estadual Paulista (UNESP). Campus de São Paulo. São Paulo , SP, Brazil

Abstract

Dynamical chiral symmetry breaking and confinement are two crucial features of the strong interactions. Models which aspire to describe such theory certainly should manifest these properties. Both phenomena are essentially of non-perturbative nature and a natural vehicle for studying them is through the Schwinger-Dyson Equations. The main goal of this project is to study the Schwinger-Dyson Equation that governs the quark propagator, in order to determine whether non-trivial and physically acceptable solutions for the quark dynamical mass can emerged when the gluon propagador is endowed with a dynamical mass in the infrared region. The crucial point of the proposed project is to go beyond the Abelian- approximation for quark-gluon vertex that is commonly employed in the literature. An affirmative answer will allow us to reconcile the strong preference for the massive gluon propagator derived in a series of phenomenological test with the chiral symmetry breaking phenomenon. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ARLENE C. AGUILAR; JOANNIS PAPAVASSILIOU. Analyzing dynamical gluon mass generation. Brazilian Journal of Physics, v. 37, p. 239-245, 2007-03-00. (05/04066-0)