Central European Journal of Physics

, Volume 2, Issue 2, pp 367–381 | Cite as

Mean-field expansion and meson effects in chiral condensate of analytically regularized Nambu-Jona-Lasinio model

  • Rauf G. Jafarov
  • Vladimir E. Rochev


Scalar meson contributions in chiral quark condensate are calculated in the analytically regularized Nambu-Jona-Lasinio model using the framework of mean-field expansion in bilocal-source formalism. The sigma-meson contribution for physical values of the parameters is found to be small. Pion contribution is found to be significant and should be taken into account for the choice of the parameter values.


Nambu-Jona-Lasinio model chiral condensate mean-field expansion analytical regularization meson contributions 

PACS (2000)

12.39.Fe 11.30.Rd 14.40.Aq 14.40.Cs 14.65.Bt 


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Copyright information

© Central European Science Journals 2004

Authors and Affiliations

  • Rauf G. Jafarov
    • 1
  • Vladimir E. Rochev
    • 2
  1. 1.Physical Department of Baku State UniversityBakuAzerbaijan
  2. 2.Institute for High Energy PhysicsProtvinoRussia

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