Massive supermultiplet
= Massive supermultiplet
A <massive supermultiplet> is a <unitary irreducible representation> of the <Super-Poincaré algebra> with positive timelike momentum. At rest, its nonzero <supercharges> become <fermionic creation operators> and <fermionic annihilation operators>. Without <central charges in supersymmetry>, four-dimensional extended <supersymmetry> has $2\mathcal N$ complex oscillators; a spin-$j$ <Clifford vacuum> gives $(2j+1)2^{2\mathcal N}$ states.