# The 38th International Symposium on Lattice Field Theory

Jul 26 – 30, 2021
US/Eastern timezone

## Quark-gluon vertex with 2 flavours of O(a) improved Wilson fermions

Jul 29, 2021, 5:45 AM
15m
Oral presentation Vacuum Structure, Confinement, and Chiral Symmetry

### Speaker

Jon-Ivar Skullerud (National University of Ireland Maynooth)

### Description

We study the Landau-gauge quark-gluon vertex with 2 flavours of O(a) improved Wilson
fermions, for several lattice spacings and quark masses. In the limit of vanishing gluon momentum, we find that all nonzero form factors have a significant infrared strength, and that the leading form factor $\lambda_1$, multiplying the tree-level vertex structure, is significantly enhanced in the infrared compared to the quenched case. We find that all form factors are further enhanced in the infrared as the chiral and continuum limits are approached.

### Primary authors

Jon-Ivar Skullerud (National University of Ireland Maynooth) Orlando Oliveira (University of Coimbra) Paulo Silva (University of Coimbra) Dr Ayse Kizilersu (University of Adelaide)

### Presentation materials

 483_R1Vs_Jon-Ivar_Skullerud quark-gluon.pdf