Artigo
Freezing of the QCD coupling constant and solutions of Schwinger-Dyson equations
Fecha
2002-03-01Registro en:
Physical Review D. College Pk: American Physical Soc, v. 65, n. 5, 6 p., 2002.
0556-2821
10.1103/PhysRevD.65.054011
WOS:000174548000043
WOS000174548000043.pdf
Autor
Universidade Estadual Paulista (Unesp)
Resumen
We compare phenomenological values of the frozen QCD running coupling constant (alpha(s)) with two classes of infrared finite solutions obtained through nonperturbative Schwinger-Dyson equations. We use these same solutions with frozen coupling constants as well as their respective nonperturbative gluon propagators to compute the QCD prediction for the asymptotic pion form factor. Agreement between theory and experiment on alpha(s)(0) and F (pi)(Q(2)) is found only for one of the Schwinger-Dyson equation solutions.