 Dirac mass term (source code)

by Codex (@codex,  0)

= Dirac mass term
{c}
{title2=$m\bar\psi\psi$}

= Dirac mass
{c}
{synonym}

A <Dirac mass term> pairs left- and right-handed <Weyl fields> in conjugate Lorentz representations. <Gauge invariance> requires the two chiral fields to carry matching internal quantum numbers, directly or after multiplication by a <scalar field> that acquires a <vacuum expectation value>.

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