Cut-Off and Effective Meson Field Theory

  • M. Jaminon
  • G. Ripka
  • P. Stassart
Part of the NATO ASI Series book series (NSSB, volume 205)


QCD is known to reduce to an effective meson field theory when the number of colors is large. The baryons are soliton configurations of the meson fields. At low energy, chiral symmetry determines much of the meson Lagrangian. One such effective meson Lagrangian is the Nambu Jona-Lasinio (NJL) model.1 The constituent quark mass emerges from a spontaneous symmetry breaking. An explicit symmetry breaking term is added to ensure that the pion, which otherwise is a massless Goldstone boson, has a nonzero mass. Since the NJL Lagrangian is not renormalizable, the regularization procedure becomes part of the model. In the present paper, we investigate the behavior of the constituent quark mass in the vacuum with the choice of the regularization scheme and with the value of the corresponding cut-off.


Nuclear Matter Chiral Symmetry Lower Branch Regularization Scheme Regularization Procedure 
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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • M. Jaminon
    • 1
  • G. Ripka
    • 2
  • P. Stassart
    • 1
  1. 1.Institut de Physique B5Université de LiègeLiège 1Belgium
  2. 2.Physique ThéoriqueC.E.N. de SaclayGif-sur-Yvette CédexFrance

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