"Figure 5a" of "Search for heavy resonances decaying into two Higgs bosons in the $\mathrm{b\bar{b}}τ^+τ^-$ final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

Expected and observed upper limits at 95% CL on the production cross section of resonant HH production for a spin-0 narrow resonance. This calculation assumes SM branching fractions of the H boson as discussed in Sec.1. The observed limits are higher than the expected limits for mass points above 2.5 TeV, primarily because of the excess of events visible in the highest bin of Fig.4 (left).