Date: 2024-02-25 | Article ID: 79649 |

Article 10142 introduced the idea of the **renormalization group** in quantum field theory. In colloquial terms, the renormalization group describes how a model changes when we "zoom out." Article 22212 derived a system of ordinary differential equations that describe how the coefficients in the action of a scalar quantum field change under the flow of the renormalization group. This article uses those flow equations to study which parts of the action are **relevant** (becoming more important at lower resolution) and which parts are **irrelevant** (becoming less important at lower resolution) with respect to the **trivial fixed point**, where interactions are absent.

**2024-02-25**(fixed incorrect grammar: "whether or not" -> "whether" when the outcome is in question)**2023-02-11**(replaced a link in a footnote with a proper citation)**2023-02-10**(first version)

www.cphysics.org | © 2018-2024 Randy S For noncommercial use only |
updated 2024-07-11 |