On the radiative pion decay

2008/01/16 by Rene Unterdorfer, H. Pichl, Hannes Pichl · 4 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-008-0584-8

published as Eur.Phys.J.C55:273-283,2008 · 22 pages, 2 figures

arxiv created 2008/01/16 · openalex publication_date 2008/04/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A reanalysis of the radiative pion decay together with the calculation of the radiative corrections within chiral perturbation theory (CHPT) is performed. The amplitude of this decay contains an inner Bremsstrahlung contribution and a structure-dependent part that are both accessible in experiments. In order to obtain a reliable estimate of the hadronic contributions we combine the CHPT result with a large-N_C expansion and experimental data on other decays, which makes it possible to determine the occurring coupling constants.

Citations

• Global aspects of current algebra
• Degenerate Systems and Mass Singularities
• A planar diagram theory for strong interactions

Cited by

• Study of the radiative pion decay
• ChPT calculations of pionic formfactors
• Hadronic light-by-light scattering and the pion polarizability
• New method for fitting the low-energy constants in chiral perturbation theory

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• Study of the radiative pion decay
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• Applied Chiral Perturbation Theory
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