Zerwekh, A. R.Rosenfeld, Rogério [UNESP]2014-05-202014-05-202001-03-29Physics Letters B. Amsterdam: Elsevier B.V., v. 503, n. 3-4, p. 325-330, 2001.0370-2693http://hdl.handle.net/11449/23339We show that the usual vector meson dominance method does not apply directly to the mixing of a color-octet vector boson (color-octet technirho) with the gluon because of gauge invariance. We propose a gauge invariant method where one works in a physical basis with mass eigenstate fields, As a result, we show that the physical technirho does not couple to two gluons, contrary to the general belief, Consequences for the production of a pair of color-octet, isosinglet technipions (technietas) at Fermilab is analyzed by means of a simulation of the signal and background, including kinematical cuts. We find that the signal is too small to be observed. (C) 2001 Published by Elsevier B.V. B.V.325-330engArtigo10.1016/S0370-2693(01)00222-2WOS:000167817400013Acesso restrito