On the possible role of strong gravity in toponium

We discuss the recent observation of an excess of events at the threshold energy for $t\bar{t}$ production at the LHC - interpreted as a quasi-bound state of toponium - as possible evidence for strong gravity at the attometer scale. By incorporating in the theoretical analysis the Sommerfeld factor for a putative strong gravity term related to the gravitoweak conjecture – in which gravity at the attometer scale has the same strength as charged weak interactions – an agreement within less than one standard deviation is achieved with the measured cross-section at CMS and ATLAS experiments. The consequences of this gravitoweak conjecture are then extended to $t\bar{t}$ scattering at higher energies, predicting suppression of the related cross-sections above $\sqrt{s}\simeq$ 4 TeV, when the produced $t\bar{t}$ should merge into a microscopic black hole with no available decay channels other than Hawking radiation.