thoms2543
Oct31-09, 12:30 AM
do anyone can help to solve this vertex correction for W boson?
\frac{-ieg^{2}}{8(2\pi)^{4}}\int d^{4}k\gamma^{\alpha}(1-\gamma_{5})(p'_{\mu}\gamma_{\mu}-k_{\mu}\gamma_{\mu}+m)\gamma^{\tau}(p_{\mu}\gamma_ {\mu}-k_{\mu}\gamma_{\mu}+m)\gamma^{\beta}(1-\gamma_{5})(-g_{\alpha\beta}+\frac{k_{\alpha}k_{\beta}}{m^{2}_{ W}}+i\epsilon)/[(p'-k)2-m2+i\epsilon][(p-k)2-m2+i\epsilon][k2-m^{2}_{W}+i\epsilon]
\frac{-ieg^{2}}{8(2\pi)^{4}}\int d^{4}k\gamma^{\alpha}(1-\gamma_{5})(p'_{\mu}\gamma_{\mu}-k_{\mu}\gamma_{\mu}+m)\gamma^{\tau}(p_{\mu}\gamma_ {\mu}-k_{\mu}\gamma_{\mu}+m)\gamma^{\beta}(1-\gamma_{5})(-g_{\alpha\beta}+\frac{k_{\alpha}k_{\beta}}{m^{2}_{ W}}+i\epsilon)/[(p'-k)2-m2+i\epsilon][(p-k)2-m2+i\epsilon][k2-m^{2}_{W}+i\epsilon]