√$_{s}$ = 14 TeV pp → e $^{+}$e − pp → µ $^{+}$µ − g ′ 1 M$_{Z}$ ′ = 1 TeV M$_{Z}$ ′ = 2 TeV M$_{Z}$ ′ = 3 TeV M$_{Z}$ ′ = 1 TeV M$_{Z}$ ′ = 2 TeV M$_{Z}$ ′ = 3 TeV 0.025 2.5(7.0) 50( > 100) > 100( > 300) 15(30) > 100( > 100) > 300( > 300) 0.05 0.4(1.0) 9(20) 80( > 100) 0.8(2.5) 20(50) > 100( > 100) 0.1 0.07(0.2) 1.5(4.0) 15(50) 0.1(0.3) 2.0(6.0) 20(65) 0.2 − ( − ) 0.3(1.0) 3(10) − ( − ) 0.4(1.2) 3(12) TABLE V: Minimum integrated luminosities (in fb − $^{1}$) for a 3 σ ( 5 σ ) discovery for selected Z ′ B − L boson masses and g ′ 1 couplings for the B − L model. No numbers are quoted for already excluded configurations. cross sections) for selected benchmark points on the 3 σ and 5 σ lines for 10 fb − 1 of data at √$_{s}$ = 14 TeV, plotting the dilepton invariant mass to which just the cuts of eq. (10) have been applied (without selecting any mass window). The improved resolution for electrons allows a measure of the Z ′ B − L boson width not only at high masses, but also opens the possibility of a measurement even for smaller masses as compared to the √$_{s}$ = 10 TeV setup. V. Z ′ SECTOR: EXCLUSION POWER A. LHC at √ s = 7 TeV 22 We start by looking at the 95% C.L. limits presented in figure 12 for the Tevatron and for this stage of the LHC (for 10 fb − 1 and 1 fb − 1 of integrated luminosity, respectively). One can see that the different resolutions imply that the limits derived using electrons are always more stringent than those derived using muons in excluding the Z ′ B − L boson. As for the discovery reach, the Tevatron is also competitive in setting limits, especially in the If no evidence for a signal is found at the LHC at any energy and luminosity configu- rations, 95% C.L. exclusion limits can be derived: in the following subsections we present exclusion plots for each stage of the LHC CM energy. We also show the expected exclusions at the Tevatron for ∫ L = 10 fb − $^{1}$.