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\ < 1.0. We obtain sigma = 6.1 +/- 1.9(stat) +/- 2.4(syst) mu-b for b quarks with transverse momentum P(T) > 11.5 GeV/c and rapidity \y\ < 1.0.

Measurement of the Beta-meson and B-quark Cross-sections At Root-s = 1.8 Tev Using the Exclusive Decay Beta+/--]j/psi-kappa+/-

BISELLO, DARIO;BUSETTO, GIOVANNI;MARIOTTI, MOSE';
1992

Abstract

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\ < 1.0. We obtain sigma = 6.1 +/- 1.9(stat) +/- 2.4(syst) mu-b for b quarks with transverse momentum P(T) > 11.5 GeV/c and rapidity \y\ < 1.0.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2518468
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