2004/10/31 by Alexander C. Kalloniatis, Byung-Yoon Park
Physics and Astronomy · #Atomic physics #Ground state #High-Energy Particle Collisions Research #Lagrangian #Mathematical physics #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Skyrmion #hep-ph
paper · pdf · doi:10.1103/physrevd.71.034010
published as Phys.Rev.D71:034010,2005 · 8 pages, 4 figures. Corrections in light of referee comments
arxiv created 2005/01/21 · openalex publication_date 2005/02/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the density dependence of the decay \ensuremathπ0\ensuremath→\ensuremathγ\ensuremathγ using the Skyrme Lagrangian to describe simultaneously both the matter background and mesonic fluctuations. The classical ground state configuration has different chiral properties depending on the Skyrmion density, which is reflected in the physical properties of pion fluctuating on top of the classical background. This leads to large suppression at high density of both photo-production from the neutral pion and the reverse process. The effective charges of \ensuremathπ^\ifmmode±\else\textpm\fi are also discussed in the same framework.