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in table VI, for selected values of couplings and integrated luminosities. 

## B. LHC at √ s = 10 TeV 

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 

