Predictions for all processes e + e − → 4 fermions + γ

نویسندگان

A. Denner

S. Dittmaier

M. Roth

D. Wackeroth

چکیده

The complete matrix elements for e + e − → 4f and e + e − → 4f γ are calculated in the Electroweak Standard Model for polarized massless fermions. The matrix elements for all final states are reduced to a few compact generic functions. Monte Carlo generators for e + e − → 4f and e + e − → 4f γ are constructed. We compare different treatments of the finite widths of the electroweak gauge bosons; in particular, we include a scheme with a complex gauge-boson mass that obeys all Ward identities. The detailed discussion of numerical results comprises integrated cross sections as well as photon-energy distributions for all different final states.

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