"Asymptotic Limits per Channel" of "Search for excited tau leptons in the $\tau\tau\gamma$ final state in pp collisions at $\sqrt{s}=13\,\mathrm{TeV}$"

Observed upper limits on the cross section times branching fraction, as a function of the τ∗ mass, for single τ∗ production via a contact interaction in association with a SM τ. The limits are shown for when the final states are treated as independent.