= UA1 experiment
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The 1983 <UA1 experiment> paper used <proton>–<antiproton> collisions at $\sqrt{s}=540\,\mathrm{GeV}$. A high-<transverse momentum> <Electron> candidate required a track matched to an electromagnetic <particle shower>, with little energy behind it in the hadronic <particle calorimeter>. Test beams checked <Electron> and <pion> responses; ordinary events and <particle jet> samples checked the imbalance resolution. Two searches, beginning with isolated <Electrons> and with missing transverse energy, converged on the same candidates. Conversion pairs, hadrons and heavy-flavor decays were examined as backgrounds.<Experimental Observation of Isolated Large Transverse Energy Electrons with Associated Missing Energy at sqrt(s) = 540 GeV by G. Arnison>[1983 paper, sections 2–4, 6–10, Table 1, Figs.1, 5, 8–9]{ref}
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