Tag Info

New answers tagged

1

What we are looking at here is a $\sigma$-model that exemplifies strong chiral symmetry breaking. The theory first only contains a massless Dirac spinor $\psi$, which is assumed to transform in the fundamental representation1 of a global $\mathrm{SU}(2)_\text{iso}$ symmetry. The Lagrangian contains only the kinetic term: $$ L[\psi] = \mathrm{i} \bar\psi ...



Top 50 recent answers are included