Formula_7021

\[T\left(k, k^{\prime}, z\right)=\hat{v}\left(k-k^{\prime}\right)-\int \hat{v}(k-q)\left(q^{2}-z\right)^{-1} T\left(\boldsymbol{q}, \boldsymbol{k}^{\prime}, z\right) d q,\]