D0 Measurements of Beauty Production in P[bar P] Collisions At[radical]

Book excerpt: We report a number of results on beauty production from the D[null] experiment at the Fermilab Tevatron Collider operating at[radical]s= 1.8 TeV. Measurements of the[ital b][ital[anti b]] production cross section using single muon, muon plus jet and dimuon plus jet triggers, in the data collected in 1992-93, are presented. A preliminary measurement of the[ital b][ital[anti b]] angular correlations using the dimuon data sample is also presented. We find that the[ital b]-quark production cross section for[vert-bar][ital Y][sup b][vert-bar][lt] 1.0 and[ital p][sub T][sup b][gt] 8 GeV/c is systematically higher than, although consistent within errors with, the next-to-leading order (NLO) QCD predictions. A similar comparison with QCD is observed in the[ital b][ital[anti b]] ([mu][mu]) angular correlations, where the shape of the distribution indicates a sizable contribution fro the NLO process.