Top quark pairing observed.

https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2025-008/

Relevant arxiv copy of first linked article of above news article

https://arxiv.org/abs/2601.11780

A little bit of background from https://en.wikipedia.org/wiki/Hadronization

The top quark does not hadronize

The top quark, however, decays via the weak force with a mean lifetime of 5×10⁻²⁵ seconds. Unlike all other weak interactions, which typically are much slower than strong interactions, the top quark weak decay is uniquely shorter than the time scale at which the strong force of QCD acts, so a top quark decays before it can hadronize. The top quark is therefore almost a free particle.