Speaker: Cristina Aguilar, IFGW-Unicamp

When/Where: 4:30 PM, September 20, 2016 (Sala de Defesas)

Abstract: The basic building blocks of QCD are the Green’s

functions of the fundamental physical degrees of freedom, gluons and

quarks, and of the unphysical ghosts. Even though it is well-known

that these quantities are not physical, since they depend on the

gauge-fixing scheme and parameters used to quantize the theory, it is

widely believed that QCD Green’s functions encode crucial information about

the infrared dynamics of the theory. Due to recent improvements in the

lattice simulation and the truncation schemes employed for the Schwinger-Dyson equations

we have now reached a point where the interplay between these two non-perturbative tools

can be most fruitful. In this talk several of the above points will be reviewed, with particular

emphasis on the implications for the gluonic and ghost sectors, the non-perturbative effective

charge of QCD and the chiral symmetry breaking.