- #1

- 99

- 4

^{abcd}p

_{a}q

_{b}k

_{c}s

_{d}, where p,q,k and s are four vectors (four-momentum, spin, etc). Now I know this ends up calculating exactly like a 4x4 determinant, I'm just not quite sure what its the determinant of (A matrix/tensor composed of these four vectors, I guess?), and what physical significance this quantity/determinant has.

Any and all insight is appreciated! (If it helps, I'm working on particles scattering problems)