3 Section 3 is devoted to detailed analysis of leptogluon signatures at QCD-E stages of the LHeC. Finally, concluding remarks are given in section 4. In this paper we investigate potential of QCDE stages of the LHeC in search for color octet electron via resonant production. In section 2, Lagrangian for e 8 interactions is presented and it’s decay widths and production cross sections at different stages of LHeC are evaluated. For the interaction of leptogluons with corresponding lepton and gluon we use the fol- lowing Lagrangian [8], [20]: where G α µν is field strength tensor for gluon, index α = 1 , 2 , ..., 8 denotes the color, g$_{s}$ is gauge coupling, η$_{L}$ and η$_{R}$ are the chirality factors, l$_{L}$ and l$_{R}$ denote left and right spinor components of lepton, σ µν is the anti-symmetric tensor and Λ is the compositeness scale. The leptonic chiral invariance implies η$_{L}$η$_{R}$ = 0 . For numerical calculations we add leptogluons into the CalcHEP program [21]. Decay width of the color octet electron is given by In Fig. 1 decay widths of leptogluons are presented for two scenarios, Λ = M$_{e}$ 8 and Λ = 10 TeV. L = 1 $_{2Λ}$∑ l { ¯ l α $_{8}$g$_{s}$ G α $_{µν}$σ $^{µν}$( η$_{L}$l$_{L}$ + η$_{R}$l$_{R}$ ) + h.c. } (1) Γ$_{e}$ 8 = α$_{s}$M 3 e 8 4Λ 2 (2) II. INTERACTION LAGRANGIAN, DECAY WIDTH AND PRODUCTION CROSS SECTION Table I: Tentative parameters of the LHeC linac-ring options. QCDE and EF denotes QCD Explorer and Energy Frontier, respectively. Stage E$_{e}$, GeV √ s, TeV L , 10 $^{32}$cm − $^{2}$s − 1 LHeC/QCDE-1 70 $^{1}$.4 1 − 10 LHeC/QCDE-2 140 $^{1}$.98 1 − 10 LHeC/EF 500 $^{3}$.74 1