The $O({\alpha }^2)$ Initial State QED Corrections to $e^{+}{e}^{-}\to {\gamma }^{\ast }/Z_0^{\ast }$

J. Blümlein, A. De Freitas, C. Raab +1

We calculate the complete $O({\alpha }^2)$ initial state radiation corrections to $e^{+}{e}^{-}$ annihilation into a neutral vector boson in a direct analytic computation without any approximat…