Johan Bijnens
Professor, Deputy Head of Division
Mesonic Low-Energy Constants
Author
Summary, in English
We review the status of the coupling constants of chiral Lagrangians in the meson sector, the so-called low-energy constants (LECs). We emphasize the chiral SU(2) and SU(3) Lagrangians for the strong interactions of light mesons and discuss the theoretical and experimental input for determining the corresponding LECs. In the two-flavor sector, we review the knowledge of the O(p(4)) LECs from both continuum fits and lattice QCD analyses. For chiral SU(3), next-to-next-to-leading-order (NNLO) effects play a much greater role. Our main new results are fits of the LECs L-i at both next-to-leading order (NLO) and NNLO, making extensive use of the available knowledge of NNLO LECs. We compare our results with available lattice determinations. We then discuss resonance saturation of LECs and the convergence of chiral SU(3) to NNLO. Finally, we review the status of predictions for the LECs of chiral Lagrangians with dynamical photons and leptons.
Department/s
- Theoretical Particle Physics - Has been reorganised
Publishing year
2014
Language
English
Pages
149-174
Publication/Series
Annual Review of Nuclear and Particle Science
Volume
64
Links
Document type
Journal article review
Publisher
Annual Reviews
Topic
- Subatomic Physics
Keywords
- chiral perturbation theory
- low-energy constants
- lattice QCD
- resonance
- saturation
- dynamical photons and leptons
Status
Published
ISBN/ISSN/Other
- ISSN: 1545-4134