Chiral transformation
= Chiral transformation
A <chiral transformation> rotates a Dirac field by $\psi\mapsto e^{i\alpha\gamma^5}\psi$. A massless Dirac <kinetic term> is invariant under a global <rotation>, while a <mass> term is not.
= Chiral transformation
A <chiral transformation> rotates a Dirac field by $\psi\mapsto e^{i\alpha\gamma^5}\psi$. A massless Dirac <kinetic term> is invariant under a global <rotation>, while a <mass> term is not.