The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Johan Bijnens in front of his whiteboard

Johan Bijnens

Professor, Deputy Head of Division

Johan Bijnens in front of his whiteboard

Nambu-Jona-Lasinio-like models and the low-energy effective action of QCD

Author

  • Johan Bijnens
  • Christophe Bruno
  • Eduardo de Rafael

Summary, in English

We present a derivation of the low-energy effective action of an extended Nambu-Jona-Lasinio (ENJL) model to O(p4) in the chiral counting. Two alternative scenarios are considered on how the ENJL model could originate as a low-energy approximation to QCD. The low-energy effective lagrangian we derive includes the usual pseudoscalar Goldstone modes, as well as the lower scalar, vector and axial-vector degrees of freedom. By taking appropriate limits, we recover most of the effective low-energy models discussed in the literature; in particular the gauged Yang-Mills vector lagrangian, the Georgi-Manohar constituent quark-meson model, and the QCD effective action approach model. Another property of the ensuing effective lagrangian is that it incorporates most of the short-distance relations which follow from QCD. (We derive these relations in the presence of all possible gluonic interactions to leading order in the 1 Nc expansion.) Finally the numerical predictions are compared with the experimental values of the low-energy parameters.

Publishing year

1993-02-01

Language

English

Pages

501-541

Publication/Series

Nuclear Physics, Section B

Volume

390

Issue

2

Document type

Journal article

Publisher

Elsevier

Topic

  • Other Physics Topics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0550-3213