equation icon  V ~ --------- integral 1 ( 2 ) 2 f(p2) =_ da ln 1 + p--a(1 - a) - ie = -iph(- p2 - 4m2) 1 + 4m-- + f(p2), (102) 0 m2 p2 integral dnp 1 Dn(x) =_ ----n-eipx -2, (103) (2p) p