Resonance contribution of scalar color octet to $t\bar{t}$ production at the LHC in the minimal four color quark-lepton symmetry model

Abstract

The scalar color octet contribution to the resonance $t\bar{t}$-pair production at the LHC is calculated and analysed with account of the one loop effective two gluon vertex. It is shown that this contribution from the scalar color octet $F_2$ predicted by the minimal model with the four color quark-lepton symmetry is for $\sqrt{s}=13$ TeV of about a few percents for $750<m_{F_2}<1800$ GeV and can exceed 10% for $400<m_{F_2}<750$ GeV. It is also pointed out that the search for the scalar octet $F_2$ as the resonance in the dijet mass spectra seems to be difficult because of the smallness of its one loop effective two gluon interaction.

Comments: 12 pages, 5 figures, accepted for publication in Modern Physics Letters A