Johan Bijnens
Professor, Deputy Head of Division
The isospin-3 three-particle K-matrix at NLO in ChPT
Author
Summary, in English
The three-particle K-matrix, Kdf,3 , is a scheme-dependent quantity that parametrizes short-range three-particle interactions in the relativistic-field-theory three-particle finite-volume formalism. In this work, we compute its value for systems of three pions at maximal isospin through next-to-leading order (NLO) in Chiral Perturbation Theory (ChPT). We compare the values to existing lattice QCD results and find that the agreement between lattice QCD data and ChPT in the first two coefficients of the threshold expansion of Kdf,3 is significantly improved with respect to leading order once NLO effects are incorporated.
Department/s
- Particle and nuclear physics
Publishing year
2023-05
Language
English
Publication/Series
Journal of High Energy Physics
Volume
2023
Issue
5
Document type
Journal article
Publisher
Springer
Topic
- Subatomic Physics
Keywords
- Chiral Lagrangian
- Hadronic Spectroscopy
- Lattice QCD
- Structure and Interactions
Status
Published
ISBN/ISSN/Other
- ISSN: 1029-8479