Direct measurement of the top quark mass

We measure the top quark mass m_t using t tbar pairs produced in the D0 detector by root(s) = 1.8 TeV p pbar collisions in a 125 pb~-1 exposure at the Fermilab Tevatron. We make a two constraint fit to m_t in t tbar --> b W~+ bbar W~- final states with one W decaying to q qbar and the other to e nu or mu nu. 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 m_t = 173.3 +- 5.6 (stat) +- 6.2 (syst) GeV/c~2.

Note:

11 pages with 3 encapsulated PostScript figures and 1 encapsulated PostScript table included in the body of the article Report-no: Fermilab-Pub-97/059-E

D0
anti-p p: colliding beams
anti-p p: inclusive reaction
top: pair production
mass: top
final state: ((n)jet lepton)
statistical analysis
DZERO
experimental results
Batavia TEVATRON Coll

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