Equation Icon  ∫ ( ) μναβ π2 μναβ d4p − ipx m2 2 F (x ) = ---ℱx ----4 e 1 + 4 -2- I(p) 45 (2π∫) ( p ) 8π2 μν αβ d4p −ipx m2 2 + -9--ℱx ℱx (2π)4-e 3 Δξ + -p2 I(p), (100 )