Figure 11: Pseudo-rapidity distributions of electrons for signal and background at √ s $^{= 1}$.98 TeV and Λ = 10 TeV. Figure 12: ej invariant mass distributions for signal and background at √ s $^{= 1}$.98 TeV and Λ = 10 TeV. Finally, for a given L$_{int}$ = 1 fb − $^{1}$, the upper mass limits for 5 σ discovery at LHeC/QCDE-2 are M$_{e}$ 8 = 1580 GeV and M$_{e}$ 8 = 1775 GeV for Λ = 10 TeV and Λ = M$_{e}$ 8 , respectively. 10 10 -3 10 -2 10 -1 10 0 10 1 10 2 -4 -3 -2 -1  0  1  2  3  4 (1/$^{σ}$ ) d$^{σ}$ /d s=1.98 TeV Background (q) M$_{e8}$ =500 GeV (G) M$_{e8}$ =750 GeV (G) M$_{e8}$ =1000 GeV (G) M$_{e8}$ =1250 GeV (G) M$_{e8}$ =1500 GeV (G) 10 -6 10 -4 10 -2 10 0 10 2 10 4 10 6  400  600  800  1000 1200 1400 1600 1800 2000 d /dM je - (pb/GeV) M$_{je}$ - (GeV) Background(j,e $^{-}$) M$_{e8}$ =500 GeV M$_{e8}$ =750 GeV M$_{e8}$ =1000 GeV M$_{e8}$ =1250 GeV M$_{e8}$ =1500 GeV