Quark-gluon vertex in arbitrary kinematics
Jon-Ivar Skullerud, Patrick O. Bowman, Ayse Kizilersu, Derek B., Leinweber, Anthony G. Williams
TL;DR
This paper computes the quark-gluon vertex in quenched lattice QCD, revealing a complex tensor structure and infrared enhancement across various kinematics, advancing understanding of strong interaction dynamics.
Contribution
It provides the first detailed lattice QCD calculation of the quark-gluon vertex in arbitrary kinematics with an improved fermion action.
Findings
Rich tensor structure observed in the vertex
Infrared enhancement of interaction strength
Complete vertex computed in specific kinematic limits
Abstract
We compute the quark-gluon vertex in quenched lattice QCD, in the Landau gauge using an off-shell mean-field O(a)-improved fermion action. The complete vertex is computed in two specific kinematical limits, while the Dirac-vector part is computed for arbitrary kinematics. We find a nontrivial and rich tensor structure, including a substantial infrared enhancement of the interaction strength regardless of kinematics.
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