R. Najima et Y. Kurihara, COMPLETE TREE LEVEL EVALUATION FOR THE REACTION E(-)-]V(E)(V)OVER-BAR(E)W(+)W(-) BY AN AUTOMATIC AMPLITUDE GENERATOR()E(), Computer physics communications, 99(1), 1996, pp. 73-76
We present the complete calculation for the reaction e(+)e(-) --> <nu(
e)(nu)over bar eW+W-> which includes all the tree level Feynman diagra
ms (60) in electroweak theory by employing the automatical amplitude g
enerator GRACE/CHANEL. The detailed behaviour of the W boson productio
n is analyzed. It is pointed out that the previous calculations (fusio
n and bremsstrahlung types only) are insufficient and that the s-chann
el contribution (e(+)e(-) annihilation type) is not small, especially
in the case of large momentum W boson production.