Search for technicolor with DELPHI

Abstract.

Technicolor represents a viable alternative to the Higgs mechanism for generating gauge boson masses. Searches for technicolor particles \(\rho_T\) and \(\pi_T\) have been performed in the data collected by the DELPHI experiment at LEP at centre-of-mass energies between 192 and 208 GeV corresponding to an integrated luminosity of 452 pb\(^{-1}\). Good agreement is observed with the SM expectation in all channels studied. This is translated into an excluded region in the \((M_{\pi_T},M_{\rho_T})\) plane. The \(\rho_T\) production is excluded for all \(90 < M_{\rho_T}<206.7\) GeV/c\(^2\). Assuming a point-like interaction of the \(\pi_T\) with gauge bosons, an absolute lower limit on the charged \(\pi_T\) mass at 95% CL is set at 79.8 GeV/c\(^2\), independently of other parameters of the technicolor model.