Predictions for all processes e+ e- ---> 4 fermions + gamma

Apr, 1999
33 pages
Published in:
  • Nucl.Phys.B 560 (1999) 33-65
e-Print:
Report number:
  • BI-TP-99-10,
  • PSI-PR-99-12

Citations per year

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Abstract:
The complete matrix elements for e^+ e^- -> 4f and e^+ e^- -> 4f + gamma 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 + gamma 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.
Note:
  • 32 pages, LaTeX, 14 eps figures, one reference added, to appear in Nucl. Phys. B Report-no: PSI-PR-99-12, BI-TP 99/10
  • 12.15.Ji
  • 13.10.+q
  • 14.70.-e
  • 13.40.Ks
  • 14.70.17Fm
  • Gauge-boson production
  • Four-fermion production
  • Helicity amplitudes
  • Monte Carlo integration
  • Electromagnetic corrections