Speaker
Prof.
Attilio Cucchieri
(University of Sao Paulo)
Description
By evaluating the so-called Bose-ghost propagator, we present the
first numerical evidence of BRST-symmetry breaking in minimal Landau
gauge, i.e. due to the restriction of the functional integration to
the first Gribov region in the Gribov-Zwanziger approach. We find
that our data are well described by a simple fitting function, which
can be related to a massive gluon propagator in combination with an
infrared-free (Faddeev-Popov) ghost propagator. As a consequence,
the Bose-ghost propagator, which has been proposed as a carrier of
the confining force in Yang-Mills theories in minimal Landau gauge,
presents a 1/p^4 singularity in the infrared limit.
Primary author
Prof.
Attilio Cucchieri
(University of Sao Paulo)
Co-authors
Dr
David Dudal
(Ghent University)
Dr
Nele Vandersickel
(Ghent University)
Prof.
Tereza Mendes
(University of Sao Paulo)
