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Johan Bijnens in front of his whiteboard

Johan Bijnens

Professor, Deputy Head of Division

Johan Bijnens in front of his whiteboard

Three-pion scattering : From the chiral Lagrangian to the lattice

Author

  • Jorge Baeza-Ballesteros
  • Johan Bijnens
  • Tomáš Husek
  • Fernando Romero-López
  • Stephen R. Sharpe
  • Mattias Sjö

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

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