Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-06-22
Mod.Phys.Lett.A25:2637-2643,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 1 figure, misprints in formula (14) are corrected, all the other results are valid
Scientific paper
10.1142/S0217732310033931
The contributions of $G'$-boson predicted by the chiral color symmetry of quarks to the cross section $\sigma_{t\bar{t}}$ 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 $\theta_G$ and $G'$ mass $m_{G'}$. The $G'$-boson contributions to $\sigma_{t\bar{t}}$ and $A_{\rm FB}^{p \bar p}$ are shown to be consistent with the Tevatron data on $\sigma_{t\bar{t}}$ and $A_{\rm FB}^{p \bar p}$, the allowed region in the $m_{G'} - \theta_G$ plane is discussed and around $m_{G'}=1.2 \, TeV, \; \theta_G=14^\circ $ the region of $1 \sigma$ consistency is found.
Martynov Mikhail V.
Smirnov Dmitry A.
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