We measure the top quark mass mₜ using tt̄ pairs produced in the D0 detector by √s0ex0ex=0ex0ex1.8TeVpp̄ collisions in a 125pb^-1 exposure at the Fermilab Tevatron. We make a two constraint fit to mₜ in tt̄→bW⁺b̄W^- final states with one W decaying to qq̄ and the other to eν or μν. Events are binned in fit mass versus a measure of probability for events to be signal rather than background. Likelihood fits to the data yield mₜ0ex0ex=0ex0ex173.3±5.6(stat)±6.2(syst)GeV/c².
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Abachi et al. (1997) studied this question.
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