Speaker
Caroline Felix
Description
The topological susceptibility $\chi^4$ is famous in QCD. It explains the $\eta^{\prime}$ mass, solving the $U(1)_{A}$ problem. It is also known that $\chi^4$ is related with Veneziano Ghost (VG), an unphysical mass pole in topological current $K_{\mu}$ correlator, that ensure $\chi^4 \neq 0$. Recently, Kharzeev and Levin (KL) attempted to connect the VG with confinement and so with Gribrov copies (GC) too. However, their result breaks the BRST symmetry. We analyze the topological susceptibility, in SU(3) and SU(2), using Pad{\' e} approximation and RGZ gluon propagator in MOM scheme.
Authors
Caroline Felix
Prof.
David Dudal
(KU Leuven)
Prof.
Marcelo Guimarães
(UERJ)
Prof.
Silvio Sorella
(UERJ)
