Singularities in the RG flow

Jakovác, Antal ORCID: https://orcid.org/0000-0002-7410-0093 (2026) Singularities in the RG flow. Physical Review D, 114 (4). DOI 10.1103/3wv1-fbg9

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Official URL: https://doi.org/10.1103/3wv1-fbg9

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.

Item Type:

Article

Uncontrolled Keywords:

Renormalization; Astronomy & Astrophysics; lectures;

Divisions:

Institute of Data Analytics and Information Systems

Subjects:

Computer science

DOI:

10.1103/3wv1-fbg9

ID Code:

13227