Excited QCD 2017

The Topological Susceptibility via the Gribov horizon?

8 May 2017, 17:00

30m

Sintra, Portugal

Monday Afternoon (20min talks + 10min discussions)

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 ${\chi }^4\ne 0$. 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.

Presentation materials

Talk_Caroline_Felix_eQCD17.pdf