Do you know of any papers about spin in dimensions>4? It seems that there are two independent spins in 4+1 dimensions, since you can replace spatial dimension 1 with 2 and 3 with 4, each pair not messing with the other. I found only one paper on arxiv: <http://arxiv.org/abs/0908.2484> [Broken] on 5D black holes, where is stated that in 5D indeed there are two spins. But what about more quantum physics? Did anyone have identified second spin with, say, isospin? Are there any works?