Singularities in the RG flow
Abstract
In this work, we show examples when a perturbatively irrelevant operator becomes relevant in the infrared because of the presence of an IR singularity (IR Landau pole). An example of this behavior is the four-fermion interaction that allows the formation of bound states. The reason for the appearance of the IR Landau pole is not the singular loop as in the purely perturbative case, but the infinite number of modes appearing in the renormalization group flow.
Fields of Study & Subjects
Quantum Chromodynamics and Particle Interactions
Theoretical and Computational Physics
Particle physics theoretical and experimental studies
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Volume
- 114
- Issue
- 4
- Publication date
- 29 May 2026
- Language
- EN