Effective particles in quantum field theory

TL;DR

This paper introduces a novel renormalization group approach in quantum field theory that focuses on effective particles by integrating out large invariant mass changes, with applications in collider phenomenology.

Contribution

It presents a new relativistic renormalization group method that differs from traditional approaches by not removing high-energy modes but rather large mass variations.

Findings

New RG procedure explained with known interaction examples

Applications in collider phenomenology briefly discussed

Potential for improved modeling of particle interactions

Abstract

The concept of effective particles is introduced in the Minkowski space-time Hamiltonians in quantum field theory using a new kind of the relativistic renormalization group procedure that does not integrate out high-energy modes but instead integrates out the large changes of invariant mass. The new procedure is explained using examples of known interactions. Some applications in phenomenology, including processes measurable in colliders, are briefly presented.