Low-Scale Technicolor at the Tevatron

Abstract

In multiscale models of walking technicolor, relatively light color-singlet technipions are produced in $q \ol q$ annihilation in association with longitudinal $W$ and $Z$ bosons and with each other. The technipions decay as $\tpiz \ra b \ol b$ and $\tpip \ra c \ol b$. Their production rates are resonantly enhanced by isovector technirho vector mesons with mass $M_W + M_{\tpi} \simle M_{\tro} \simle 2 M_{\tpi}$. At the Tevatron, these associated production rates are 1--10 picobarns for $M_{\tpi} \simeq 100\,\gev$. Such a low mass technipion requires topcolor-assisted technicolor to suppress the decay $t \ra \tpip b$. Searches for $\tpi\tpi$ production will also be rewarding. Sizable rates are expected if $M_{\tro} \simge 2M_{\tpi} + 10\,\gev$. The isoscalar $ω_T$ is nearly degenerate with $\tro$ and is expected to be produced at roughly the same rate. The $ω_T$ should have the distinctive decay modes $ω_T \ra γ\tpiz$ and $Z \tpiz$.