Equation Icon  ∘ --------[ ( )2 ( )2 ] &tidle; μναβ θ(−-p2 −-4m2)- m2- 1- m2- 22 μναβ m2- 2 2 μν αβ N (p) = 720 π 1+ 4 p2 4 1+ 4 p2 (p )P +10 3Δ ξ+ p2 (p ) P P , (125 )