A gauge model with chiral color symmetry is considered and possible effects of the color G ′ -boson octet predicted by this symmetry are investigated in dependence on two free parameters, the mixing angle θ G and G ′ mass m G ′ . The allowed region in the m G ′ − θ G plane is found from the Tevatron data on the cross section σ tt and forward-backward asymmetry A pp FB of the tt production. The mass limits for the G ′ -boson are shown to be stronger than those for the axigluon. A possible effect of the G ′ -boson on the tt production at the LHC is discussed and the mass limits providing for the G ′ -boson evidence at the LHC are estimated in dependence on θ G .

A gauge model with chiral color symmetry of quarks is considered and possible effects of the color G ′ -boson octet predicted by this symmetry are investigated. The contributions of the G ′ -boson to the cross section σ tt and to the forward-backward asymmetry A pp FB of tt production at the Tevatron are calculated and analysed in dependence on two free parameters of the model, the mixing angle θ G and G ′ mass m G ′ . The G ′ -boson contributions to σ tt and A pp FB are shown to be consistent with the Tevatron data on σ tt and A pp FB , the allowed region in the m G ′ − θ G plane is discussed and around m G ′ = 1.2 T eV, θ G = 14 • the region of 1σ consistency is found.

Cross sections of the colored scalar particle production in pp-collisions are calculated and differential and total cross sections of the corresponding parton subprocesses are obtained. The total cross section of scalar gluon production in pp-collisions at the LHC is estimated and the dominant decays of scalar gluons are discussed. The production cross section of scalar gluons F with masses mF ≲ 1300 GeV is shown to be sufficient for the effective production of these particles at the LHC.

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