Johan Bijnens
Professor, Deputy Head of Division
Three-pion scattering : From the chiral Lagrangian to the lattice
Author
Summary, in English
In recent years, detailed studies of three-pion systems have become possible in lattice QCD. This has in turn led to interest in 3-to-3 scattering of pions in the chiral perturbation theory framework. In addition to being an interesting study of multi-meson dynamics in its own right, it provides a valuable handle on finite-volume effects and the pion mass dependence, thus complementing the lattice results. I present our derivation of the next-to-leading order amplitude for this process, as well as its conversion into the three-particle K-matrix, which enables direct comparison to the lattice. Our results significantly improve the agreement between theory and lattice, which was poor when only leading-order effects were taken into account.
Department/s
- Particle and nuclear physics
Publishing year
2024
Language
English
Pages
32-36
Publication/Series
Nuclear and Particle Physics Proceedings
Volume
343
Links
Document type
Journal article
Publisher
Elsevier
Topic
- Subatomic Physics
Keywords
- Chiral Lagrangian
- Hadronic spectroscopy
- Lattice QCD
- Structure and interactions
Status
Published
ISBN/ISSN/Other
- ISSN: 2405-6014