CHIRAL COLOR SYMMETRY AND POSSIBLE G′-BOSON EFFECTS AT THE TEVATRON AND LHC

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 theta(G) and G' mass m(G'). The allowed region in the m(G')-theta(G) plane is found from the Tevatron data on the cross section sigma(t (t) over bar) and forward-backward asymmetry A(FB)(pp) of the t (t) over bar 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 t (t) over bar production at the LHC is discussed and the mass limits providing for the G'-boson evidence at the LHC are estimated in dependence on theta(G).