Walking technicolor signatures at hadron colliders

Aspects of the dynamics of walking technicolor models are expected to have important consequences for technihadron production at hadron colliders. Hard-mass enhancements characteristic of walking technicolor raise technipion (π_T) masses relative to technirho (ρ_T) masses so that the decays ρ_T-->π_Tπ_T are either suppressed or forbidden altogether. Thus, ρ_T can be unusually narrow with unconventional decay modes. Large weak isospin breaking in U- and D-technifermion masses (required for t-b splitting) leads to neutral ρ_T and π_T that are ideally mixed. Finally, multiscale models of walking technicolor in which the light-scale technifermions carry ordinary SU(3) color can have color-octet ρ_T's which are produced strongly in parton-parton collisions and are within reach of the Fermilab Tevatron. These would appear as narrow, well-separated ρ_D¯D and ρ_U¯U resonances in dijet production or in π_Tπ_T production with a limited number of final states. These expectations are illustrated in a multiscale model containing both techniquarks and technileptons at the light scale. Depending on assumptions that determine the fundamental chiral-symmetry-breaking mass parameters of the model, we find two generic phenomenologies: (A) ρ_D¯D with a mass of 200-250 GeV decaying exclusively to dijets and ρ_U¯U in the mass range 350-550 GeV decaying to a few π_Tπ_T combinations; (B) ρ_D¯D with a mass of 375-425 GeV and ρ_U¯U in the mass range 500-700 GeV both decaying to a few π_Tπ_T modes. The ρ_D¯D-->dijet signal of case A is large at all colliders and can be sought now at the Tevatron. The π_Tπ_T production rates in both cases are of ~10 pb at the Tevatron and ~10 nb at the Superconducting Super Collider (SSC). The technipions can be sought in the next high-luminosity run of the Tevatron and may be excludable if backgrounds are not too severe. Experiments at the SSC certainly should be able to determine whether they exist.