Paper detail

On mass limit for chiral color symmetry $G'$-boson from Tevatron data on $t \bar{t}$ production

The contributions of $G'$-boson predicted by the chiral color symmetry of quarks to the cross section $σ_{t\bar{t}}$ and to the forward-backward asymmetry $A_{\rm FB}^{p \bar p}$ of $t\bar{t}$ production at the Tevatron are calculated with account of the difference of the strengths of the $\bar q q G$ and $\bar q q G'$ interactions. The results are 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 $σ_{t\bar{t}}$ and $A_{\rm FB}^{p \bar p}$ are shown to be consistent with the Tevatron data on $σ_{t\bar{t}}$ and $A_{\rm FB}^{p \bar p}$, the allowed region in the $m_{G'} - θ_G$ plane is discussed and around $m_{G'}=1.2 \, TeV, \; θ_G=14^\circ $ the region of $1 σ$ consistency is found.