= Light-cone decomposition of a massive spin-two field
{title2=$\operatorname{Sym}_0^2(\mathbb R^{D-1})\downarrow SO(D-2)=\operatorname{Sym}_0^2(\mathbb R^{D-2})\oplus\mathbb R^{D-2}\oplus\mathbb R$}
When $\partial_-$ is invertible, divergence determines components with a plus index from $h_{--},h_{-I},h_{IJ}$. The <trace> constraint fixes the <trace> of $h_{IJ}$. The remaining transverse <group representations> are a <symmetric traceless square>, a <vector representation>, and a scalar.
Back to article page
