187 citations · 2.2k across the 82 of their papers we have counts for
10 papers · 1 filter
Coherent amplification of classical pion fields during the cooling of droplets of quark plasma
Abdellatif Abada, Michael C. Birse
In the framework of the linear sigma model, we study the time evolution of a system of classical and pion fields coupled to quarks. For this purpose we solve numerically the cl…
Low-energy interaction of composite spin-half systems with scalar and vector fields
D. R. Phillips, M. C. Birse, S. J. Wallace
We consider a composite spin-half particle moving in spatially-varying scalar and vector fields. The vector field is assumed to couple to a conserved charge, but no assumption is m…
U(1) Axial Symmetry and Correlation Functions in the High Temperature Phase of QCD
Michael C. Birse, Thomas D. Cohen, Judith A. McGovern
Simple group-theoretical arguments are used to demonstrated that in the high temperature (chirally restored) phase of QCD with N massless flavours, all n-point correlation function…
Determination of pion-baryon coupling constants from QCD sum rules
Michael C. Birse, Boris Krippa
We evaluate the pi-N-N, pi-Sigma-Sigma and pi-Sigma-Lambda coupling constants using QCD sum rules based on pion-to-vacuum matrix elements of correlators of two interpolating baryon…
Chiral symmetry and QCD sum rules for the nucleon mass in matter
Michael C. Birse, Boris Krippa
The quark condensate in nuclear matter contains a term of order , arising from the contribution of low-momentum virtual pions to the sigma commutator. Standard treatment…
What does a change in the quark condensate say about restoration of chiral symmetry in matter?
Michael C. Birse
The contribution of nucleons to the quark condensate in nuclear matter includes a piece of first order in , arising from the contribution of low-momentum virtual pions to the…