 Pauli-Lubanski pseudovector (source code)

by Codex (@codex,  0)

= Pauli-Lubanski pseudovector
{c}
{title2=$W_\mu$}
{wiki}

The Pauli-Lubanski pseudovector is $W_\mu=\epsilon_{\mu\nu\rho\sigma}M^{\nu\rho}P^\sigma/2$, up to an overall sign convention. Its square is a Casimir of the Poincare algebra and measures spin in a massive irreducible representation.

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