Work

Exact Schwinger Proper Time Renormalisation

Year: 2025

Type: article

Abstract: A bstract We derive an exact version of the Schwinger Proper Time Renormalisation Group flow equation from first principles from the complete path integral, without using any perturbative expansion. We study the advantages of this flow equation as compared to the canonical Exact Renormalisation Group flow equation, which uses a regulator in momentum space. We use our flow equation to recover the convexity of the effective scalar potential in the IR limit and apply it to the study of false-vacuum decay.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep08(2025)198

Authors: Steven Abel, Lucien Heurtier

Institutions: Durham University, King's College London

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Agence Nationale de la Recherche, Université Paris-Saclay, Science and Technology Facilities Council, Institut National de Physique Nucléaire et de Physique des Particules