= Helicity spectrum of a massless supermultiplet
{title2=$h_k=\lambda-k/2$}
= Helicity spectra of massless supermultiplets
{synonym}
For a four-dimensional <massless supermultiplet> with $\mathcal N$ independent <supercharges> and highest <helicity> $\lambda$, level $k$ has <helicity> $\lambda-k/2$ and multiplicity $\binom{\mathcal N}{k}$. The total is $2^{\mathcal N}$ states and the <helicity> range has width $\mathcal N/2$, before any necessary <CPT completion of a supermultiplet>.
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