Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cross Section and Forward-Backward Asymmetry of $t\bar{t}$ Production in
  the Model with Four Color Symmetry   The contributions to the cross section $\sigma_{t\bar{t}}$ and to the
forward-backward asymmetry $A_{\rm FB}^{t \bar t}$ of $t\bar{t}$ production at
the Tevatron from $Z'$-boson and scalar leptoquarks $S^{(\pm)}_a$ and scalar
gluons $F_a$ predicted by the minimal model with four color quark-lepton
symmetry are calculated. These contributions are shown to be small in tree
approximation and can be significant with account of the 1-loop $gt\bar{t}$
effective vertex induced by the scalar doublets. The lower mass limit for
scalar gluons $m_F \gtrsim 320\, GeV$ from the Tevatron data is obtained and it
is shown that for $m_{F_1}\lesssim 990\,GeV$ the scalar gluon $F_1$ can be
evident at LHC at the significance not less that $3\sigma$ (for $\sqrt{s}=14$
TeV, $L=10\,fb^{-1}$).

25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs