Measurement of the $B^+$ Total Cross Section and $B^+$ Differential Cross Section $dσ/dp_T$ in $p \bar p $ Collisions at $\sqrt{s}=1.8$ TeV

Abstract

We present measurements of the B+ meson total cross section and differential cross section $dσ/ dp_T$. The measurements use a $98\pm 4$ pb^{-1} sample of $p \bar p$ collisions at $\sqrt{s}=1.8$ TeV collected by the CDF detector. Charged $B$ meson candidates are reconstructed through the decay $B^{\pm} \to J/ψK^{\pm}$ with $J/ψ\to μ^+ μ^-$. The total cross section, measured in the central rapidity region $|y|<1.0$ for $p_T(B)>6.0$ GeV/$c$, is $3.6 \pm 0.6 ({\rm stat} \oplus {\rm syst)} μ$b. The measured differential cross section is substantially larger than typical QCD predictions calculated to next-to-leading order.