D-Zero Top Quark Mass Analysis
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Published: 2001
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DOWNLOAD EBOOKI report on D[null]'s preliminary analyses of the top quark mass[ital m[sub t]] based on an exposure at[radical]s= 1.8 TeV with integrated luminosity[approx]100 pb[sup -1] at the Fermilab Tevatron[ital p][ital[anti p]] collider. From three[ital e]+[mu]+[>=] 2 jet events (with background 0.36[+-] 0.09), using partly original methods, we obtain[ital m[sub t]]= 158[+-] 24(stat)[+-] 10(syst) GeV/c[sup 2]. From 30[ital e] or[mu]+[+-]4 jets events (with background 17.4[+-]2.2), we find[ital m[sub t]]= 170[+-] 15(stat)[+-] 10(syst) GeV/c[sup 2]. Recently, using multivariate methods based on particular kinematic variables, we have learned how to improve the background suppression in the latter sample without unduly distorting the reconstructed top mass spectra. Applying these methods should improve considerably the accuracy of our top quark mass determination.