3 , s=14 TeV, L=10fb -1 Muons M + - (TeV) d /dM + - (pb/125 GeV) 10 -7 10 -6 10 -5 10 -4 10 -3 10 -2 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 4.25 (a) 5 , s=14 TeV, L=10fb -1 Muons M + - (TeV) d /dM + - (pb/125 GeV) 10 -7 10 -6 10 -5 10 -4 10 -3 10 -2 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 4.25 (b) FIG. 11: dσ dM $_{ll}$( pp → γ, Z, Z ′ → µ $^{+}$µ $^{−}$) for some masses and couplings ( M$_{Z}$ ′ / TeV, g ′ $_{1}$, Γ$_{Z}$ ′ /GeV ): (11a) ( 2 . 6 , 0 . 07 , 2 . 7 ) and ( 3 . 4 , 0 . 2 , 29 ) and (11b) ( 2 . 6 , 0 . 12 , 8 ) and ( 3 . 4 , 0 . 3 , 65 ), from the 3 σ and 5 σ lines at 10 fb − 1 $_{of figure 8 (}$√$_{s}$ = 14 TeV), using 125 GeV binning. Notice that the asymmetry of the peaks is the result of our choice to consider the full interference structure. in table VI, for selected values of couplings and integrated luminosities. Moving to the LHC at √$_{s}$ = 10 TeV, supposing that this stage will collect up to 1 fb − $^{1}$, it would be possible to further extend the region of masses that can be excluded, up to M$_{Z}$ ′ = 2 . 5 TeV irrespectively of whether one exploits electrons or muons. Figure 13a shows the 95% C.L. exclusions at this stage of the LHC comparing the sensitivities with electrons and muons, for selected values of the integrated luminosity. When g ′ 1 ≳ 0 . 2 the two channels set very close limits. For smaller couplings, electrons become more sensitive than muons, and for 1 fb − 1 both can set more stringent limits than the Tevatron at 10 fb − $^{1}$, being able to exclude a coupling down to 0 . 022 and 0 . 035, respectively. Figure 13b then shows what integrated luminosity is required to exclude a certain Z ′ B − L boson mass for the CM energy considered here. As previously noticed, electrons and muons set similar bounds on the mass 24 B. LHC at √ s = 10 TeV