Trabalho apresentado em evento
Analyzing dynamical gluon mass generation
Fecha
2007-03-01Registro en:
Brazilian Journal of Physics, v. 37, n. 1 B, p. 239-245, 2007.
0103-9733
10.1590/S0103-97332007000200013
S0103-97332007000200013
WOS:000246477800013
2-s2.0-34249109184
2-s2.0-34249109184.pdf
Autor
Universidade Estadual Paulista (Unesp)
Universidad de Valencia-CSIC
Resumen
We study the necessary conditions for obtaining infrared finite solutions from the Schwinger-Dyson equation governing the dynamics of the gluon propagator. The equation in question is set up in the Feynman gauge of the background field method, thus capturing a number of desirable features. Most notably, and in contradistinction to the standard formulation, the gluon self-energy is transverse order-by-order in the dressed loop expansion, and separately for gluonic and ghost contributions. Various subtle field-theoretic issues, such as renormalization group invariance and regularization of quadratic divergences, are briefly addressed. The infrared and ultraviolet properties of the obtained solutions are examined in detail, and the allowed range for the effective gluon mass is presented.