Color-singlet technipions at the Tevatron

I discuss production and detection at the Tevatron pp collider of pairs of light (MπT = 100–200GeV) color-singlet technipions that are expected in all nonminimal models of technicolor. Gluon fusion production rates can be as large as O(1 pb). Topcolor-assisted technicolor is required to prevent top quarks from decaying at t → πT+b. An intriguing consequence of this is that the decays πT+ → τ+ντ, cs and πT0 → bb may also be suppressed so that πT+ → W+γ and πT0 → γγ are significant. These modes have spectactular signatures at the Tevatron.