MEASUREMENT OF THE BETA-MESON AND B-QUARK CROSS-SECTIONS AT ROOT-S = 1.8 TEV USING THE EXCLUSIVE DECAY BETA+/--]J/PSI-KAPPA+/-

This Letter reports the full reconstruction of B mesons through the decay chain B +/- --> J/psi-K +/-, J/psi --> mu+-mu-, using data obtained at thc Collider Detector at Fermilab in ppBAR collisions at square-root s = 1.8 TeV. This exclusive sample, the first observed at a hadron collider, is then used to measure the B-meson cross section, from which we extract the b-quark cross section. We obtain sigma = 2.8 +/- 0.9(stat) +/- 1.1 (syst) mu-b for B- mesons with P(T) > 9.0 GeV/c and rapidity \y\ 11.5 GeV/c and rapidity \y\ < 1.0

INCLUSIVE JET CROSS-SECTION IN PBARP COLLISIONS AT SQUARE-ROOT-S = 1.8 TEV

We present a measurement of the inclusive jet cross section in ppBAR collisions at square-root s = 1.8 TeV at the Fermilab Tevatron using the Collider Detector at Fermilab. Good agreement is seen with the predictions of recent next-to-leading-order [O(alpha(s)3)] QCD predictions. The dependence of the cross section on clustering cone size is reported for the first time. An improved limit on LAMBDA(c), a term characterizing possible quark substructure, is set at 1.4 TeV (95% C.L.)

MEASUREMENT OF JET SHAPES IN (P)OVER-BAR-P COLLISIONS AT ROOT-S = 1.8 TEV

We present a measurement of jet shapes in ppBAR collisions at square-root s = 1.8 TeV at the Fermilab Tevatron using the Collider Detector at Fermilab (CDF). Qualitative agreement is seen with the predictions of recent next-to-leading [O(alpha(s)3)] calculations and with leading logarithm QCD based Monte Carlo simulations. The dependence of the jet shape on transverse energy is studied