Nambu-Jona-Lasinio model without (q)over-bar-q thresholds

Authors
Blaschke, D Burau, G Volkov, MK Yudichev, VL
Citation
D. Blaschke et al., Nambu-Jona-Lasinio model without (q)over-bar-q thresholds, PHYS ATOM N, 62(11), 1999, pp. 1919-1923
Citations number
21
Categorie Soggetti
Physics
Journal title
PHYSICS OF ATOMIC NUCLEI
ISSN journal
10637788 → ACNP
Volume
62
Issue
11
Year of publication
1999
Pages
1919 - 1923
Database
ISI
SICI code
1063-7788(199911)62:11<1919:NMW(T>2.0.ZU;2-Q
Abstract
We consider an extended Nambu-Jona-Lasinio model for the light-meson sector of QCD, where unphysical quark-production thresholds are excluded by an in frared cutoff on the momentum integration within quark-loop diagrams. This chiral quark model conserves low-energy theorems. The infrared cutoff is fi xed by the dynamically generated quark mass (quark condensate). The sigma-m eson mass and decay width are estimated within the model.