Work

Wigner rotations for cascade reactions

Year: 2025

Type: article

Abstract: Parametrization of cascading hadronic reactions is a central tool in hadron spectroscopy for modeling matrix elements and extracting parameters of hadronic states. Implementing the helicity formalism consistently presents challenges, particularly for particles with spin, due to the need to match spin states of final-state particles, an operation known as the Wigner rotation. This paper discusses these challenges in detail and offers solutions, including a practical method for implementation. Equipped with a general algorithm for computing Wigner rotations, we extend the studies to alternative amplitude formulations, the minus-phi and canonical conventions.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.111.056015

Authors: Kai Habermann, Mikhail Mikhasenko

Institutions: University of Bonn, Ruhr University Bochum

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Ministerium für Innovation, Wissenschaft und Forschung des Landes Nordrhein-Westfalen

Award: G8581501022