I've recently stumbled upon a certain piece of notation that doesn't quite seem clear to me. When discussing the amplituhedron, my teacher mentioned the relation between the volume and the amplitude scattering, and then he wrote the following on the board:
$$[1-,\,1+,\,3-,\,3+]$$
I assume these are probability amplitudes, but I don't quite what the integers and the signs mean.
This post imported from StackExchange Physics at 2014-03-07 16:34 (UCT), posted by SE-user Demian Licht