InclusiveJ/ψ, ψ(2S), andb-quark production inp¯pcollisions at √s=1.8 TeV

Abstract

Inclusive J/ψ and ψ(2S) production has been studied in p¯p collisions at √s =1.8 TeV using 2.6±0.2 ${\mathrm{pb}}^{\mathrm{-}1}$ of data taken with the Collider Detector at Fermilab. The products of production cross section times branching fraction were measured as functions of ${\mathit{P}}_{\mathit{T}}$ for J/ψ→${\mathrm{\mu }}^{+}$ ${\mathrm{\mu }}^{\mathrm{-}}$ and ψ(2S)→${\mathrm{\mu }}^{+}$ ${\mathrm{\mu }}^{\mathrm{-}}$. In the kinematic range ${\mathit{P}}_{\mathit{T}}$>6 GeV/c and ‖η‖≤0.5 we get σ(p¯p→J/ψ X)B(J/ψ→${\mathrm{\mu }}^{+}$ ${\mathrm{\mu }}^{\mathrm{-}}$) =6.88±0.23(stat${)}_{\mathrm{-}1.08}^{+0.93\mathrm{}}$(syst) nb, and σ(p¯p→ψ(2S)X)B(ψ(2S)→${\mathrm{\mu }}^{+}$ ${\mathrm{\mu }}^{\mathrm{-}}$) =0.232±0.051(stat${)}_{\mathrm{-}0.032}^{+0.029\mathrm{}}$(syst)nb. From these values we calculate the inclusive b-quark production cross section.