content_image/373302.jpg
fb − 1 the LHC experiments will be able to exclude the Z ′ B − L boson for masses up to 3 . 1 TeV for g ′ 1 = 0 . 1, 2 . 5(2 . 1) TeV for g ′ 1 = 0 . 05 and 1 . 7(1 . 1) TeV for g ′ 1 = 0 . 025, when considering decays into electrons(muons). With 100 fb − 1 of data, more stringent bounds can be derived: for g ′ 1 = 0 . 05(0 . 025) the Z ′ B − L boson can be excluded for masses up to 3 . 6(2 . 6) TeV in the electron channel, and up to 3 . 1(1 . 9) TeV in the muon channel. 

The 95% C.L. exclusions for the LHC at √$_{s}$ = 14 TeV are summarised in table VIII, for selected values of Z ′ masses and couplings. 

<img src='content_image/373302.jpg'>

## VI. CONCLUSIONS 

We have presented the discovery potential for the Z ′ gauge boson of the B − L minimal extension of the SM at the LHC for CM energies of √$_{s}$ = 7, 10 and 14 TeV, using the integrated luminosity expected at each stage. This has been done for both the Z ′ B − L → e $^{+}$e − and Z ′ B − L → µ $^{+}$µ − decay modes, and includes the most up-to-date constraints coming from LEP and the Tevatron. The comparison of the (irreducible) backgrounds with the expected backgrounds for the DØ experiment at the Tevatron validated our simulation. We proposed an alternative analysis that has the potential to improve sensitivities. We also looked in detail at the different resolutions, showing that electrons and muons present very similar discovery power for values of the coupling bigger than roughly 0 . 2(0 . 1), for √$_{s}$ = 10(14) TeV. 

We are overall confident that the inclusion of further background, as well as a realistic detector simulation, will not have a considerable impact on the results we presented. In fact, 

