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u We report the full reconstruction of Xc mesons through the decay chain Xc --+ J /..P -y, J f,P --+ ~+ ~-, using data obtained at the Collider Detector at Fermilab in p p collisions at -/i = 1.8 TeV. This exclusive Xc sample, the first observed at .JB = 1.8 TeV, is used to measure the Xc meson production cross section times branching fractions. We obtain u · Br = 3.2 ± 0.4(stat) ±lj(syst) nb for Xc mesons decaying into J N mesons with PT > 6.0 GeV /c2 and pseudorapidity 1111 < 0.5. From this and the inclusive J /..P cross section we calculate the inclusive b-quark cross section to be 12.0 ± 4.5 ~b for p~ > 8.5 GeV /c and lifl < 1. This thesis was prepared under the guidance of Professor Bruce A. Barnett.

Chi Meson Production in Proton - Antiproton Interactions at the Center-of-Mass Energy of 1.8-TeV