Fermion Condensates and the Trivial Vacuum of Light-Cone Quantum Field Theory

Details Fermion Condensates and the Trivial Vacuum of Light-Cone Quantum Field Theory Fermion Condensates and the Trivial Vacuum of Light-Cone Quantum Field Theory

1996-08-08

arxiv.org/abs/hep-th/9608043v1

Phys.Lett. B388 (1996) 129-136

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, no figures, latex2e

Scientific paper

10.1016/0370-2693(96)01155-0

We discuss the definition of condensates within light-cone quantum field theory. As the vacuum state in this formulation is trivial, we suggest to abstract vacuum properties from the particle spectrum. The latter can in principle be calculated by solving the eigenvalue problem of the light-cone Hamiltonian. We focus on fermionic condensates which are order parameters of chiral symmetry breaking. As a paradigm identity we use the Gell-Mann-Oakes-Renner relation between the quark condensate and the observable pion mass. We examine the analogues of this relation in the `t~Hooft and Schwinger model, respectively. A brief discussion of the Nambu-Jona-Lasinio model is added.

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