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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

The isospin-3 three-particle K-matrix at NLO in ChPT

Author

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

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