We report the full reconstruction of chi(c) mesons through the decay chain chi(c) --> J/psigamma, J/psi --> mu+mu-, using data obtained at the Collider Detector at Fermilab in 2.6 +/- 0.2 pb-1 of ppBAR collisions at square-root s = 1.8 TeV. This exclusive chi(c) sample is used to measure the chi(c)-meson production cross section times branching fractions. We obtain sigma x B = 3.2 +/- 0.4(stat)-1.1(+1.2)(syst) nb for chi(c) mesons decaying to J/psi with p(T) > 6.0 GeV/c and pseudorapidity Absolute value of eta < 0.5. From this and the inclusive J/psi cross section we calculate the inclusive b-quark cross section to be 12.0 +/- 4.5 mub for pT(b) > 8.5 GeV/c and \y(b)\ < 1.
Inclusive Chi-c and B-quark Production In (p)over-bar-p Collisions At Root-s = 1.8 Tev
BISELLO, DARIO;BUSETTO, GIOVANNI;LUCCHESI, DONATELLA;MARIOTTI, MOSE';
1993
Abstract
We report the full reconstruction of chi(c) mesons through the decay chain chi(c) --> J/psigamma, J/psi --> mu+mu-, using data obtained at the Collider Detector at Fermilab in 2.6 +/- 0.2 pb-1 of ppBAR collisions at square-root s = 1.8 TeV. This exclusive chi(c) sample is used to measure the chi(c)-meson production cross section times branching fractions. We obtain sigma x B = 3.2 +/- 0.4(stat)-1.1(+1.2)(syst) nb for chi(c) mesons decaying to J/psi with p(T) > 6.0 GeV/c and pseudorapidity Absolute value of eta < 0.5. From this and the inclusive J/psi cross section we calculate the inclusive b-quark cross section to be 12.0 +/- 4.5 mub for pT(b) > 8.5 GeV/c and \y(b)\ < 1.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.