Two-gluon coupling and collider phenomenology of color-octet technirho mesons

It has recently been suggested that gauge invariance forbids the coupling o f a massive color-octet vector meson to two gluons. While this is true for operators in an effective Lagrangian of dimension four or less, we demonstr ate that dimension six interactions will lead to such couplings. In the cas e of technicolor, the result is a technirho-gluon-gluon coupling comparable to the naive vector meson dominance estimate, but with a substantial uncer tainty. This has implications for several recent studies of technicolor phe nomenology. (C) 2001 Published by Elsevier Science B.V.