Triple electroweak gauge-boson production at Fermilab Tevatron energies

We calculate three-gauge-boson production in the standard model at Fermilab Tevatron energies. At √s=2 TeV in pp¯ collisions, the cross sections for triple-gauge-boson production are typically of the order of 10 fb. For the pure leptonic final states from the gauge-boson decays and with some minimal cuts on final state photons, the cross sections for pp¯→${\mathit{W}}^{\pm }$γγ, Zγγ, and ${\mathit{W}}^{+}$ ${\mathit{W}}^{\mathrm{-}}$γ processes are of the order of a few fb, resulitng in a few dozen clean leptonic events for an integrated luminosity of 10 ${\mathrm{fb}}^{\mathrm{-}1}$. The pure leptonic modes from other gauge-boson channels give a significantly smaller rate. Especially, the trilepton modes from ${\mathit{W}}^{+}$ ${\mathit{W}}^{\mathrm{-}}$ ${\mathit{W}}^{\pm }$ and ${\mathit{tt}\mathit{¯}\mathit{W}}^{\pm }$→${\mathit{W}}^{+}$ ${\mathit{W}}^{\mathrm{-}}$ ${\mathit{W}}^{\pm }$ yield a cross section of the order of 0.1 fb if there is no significant Higgs boson contribution. For a Higgs boson with ${\mathit{m}}_{\mathit{H}}$≃2${\mathit{M}}_{\mathit{Z}}$, the triple-massive-gauge-boson production rate could be enhanced by a factor of 4–6.