187 citations · 2.2k across the 82 of their papers we have counts for
5 papers · 1 filter
Low-energy theorem for a composite particle in mean scalar and vector fields
Michael C. Birse
For a relativistic particle moving in the presence of mean scalar and vector fields, the energy at second order in the scalar field is shown to contain two contributions in general…
A nonlocal, covariant generalisation of the NJL model
R. D. Bowler, M. C. Birse
We solve a nonlocal generalisation of the NJL model in the Hartree approximation. This model has a separable interaction, as suggested by instanton models of the QCD vacuum. The ch…
Chiral symmetry in nuclei: partial restoration and its consequences
Michael C. Birse
Partial restoration in nuclear matter of the chiral symmetry of QCD is discussed together with some of its possible signals. Estimates of corrections to the leading, linear depende…
Constraints on Four-Point Couplings in Low-Energy Meson Interactions
D. Kalafatis, M. C. Birse
We investigate from first principles the introduction of isospin-1 vector and axial-vector fields into the nonlinear sigma model. Chiral symmetry is nonlinearly realised and spin-1…
Does the effective Lagrangian for low-energy QCD scale?
Michael C. Birse
QCD is not an approximately scale invariant theory. Hence a dilaton field is not expected to provide a good description of the low-energy dynamics associated with the gluon condens…