effective pseudoscalar
1QCD vacuum — The QCD vacuum is the vacuum state of quantum chromodynamics (QCD). It is an example of a non perturbative vacuum state, characterized by many non vanishing condensates such as the gluon condensate or the quark condensate. These condensates… …
2Maxwell's equations — For thermodynamic relations, see Maxwell relations. Electromagnetism …
3Nambu–Jona-Lasinio model — In quantum field theory, the Nambu–Jona Lasinio model (or more precisely: the Nambu and Jona Lasinio model) is a theory of nucleons and mesons constructed from interacting Dirac fermions with chiral symmetry which parallels the construction of… …
4Nambu-Jona-Lasinio model — In quantum field theory, the Nambu Jona Lasinio model (named for its developers Yoichiro Nambu and Giovanni Jona Lasinio) is a theory of interacting Dirac fermions with chiral symmetry. It is an example of a four fermion interaction. This model… …
5Scalar field theory — In theoretical physics, scalar field theory can refer to a classical or quantum theory of scalar fields. A field which is invariant under any Lorentz transformation is called a scalar , in contrast to a vector or tensor field. The quanta of the… …
