Off-shell $W$ pair production in $e^+ e^-$ annihilation: the CC11 process

Abstract

The various four-fermion production channels in e + e − annihilation are discussed and the CC11 process $e^+e^- \to \bar f_{1}^{u}f_{1}^{d}f_{2}^d\bar f_{2}^{d}≠ e$ , is studied in section $d^2\sigma/ds_1 ds_2$ , with $s_1 , s_2$ being the invariant masses squared of the two fermion pairs, may be expressed by six generic functions. All but one may be found in the literature. The cross section, including initial-state radiation and the Coulomb correction, is discussed and compared with other calculations from low energies up to √ s = 2 TeV