Scientists of the CMS and TOTEM collaborations have looked for evidence of this process in the data collected at the LHC in 2017. To this end, they have selected tt candidates from the product of their decays reconstructed in the central CMS detector, and a proton on both sides of the interaction point from the tracks reconstructed by the CT-PPS detector. The top quark being an unstable particle, it decays mostly via a W boson and b quark. The W bosons are also transients and they decay, in turn, either leptonically (electron/muon/tau and a corresponding neutrino) or, hadronically, to a pair of quarks which produce jets or sprays of particles in the detector (link).