Measurement of the $B$ Meson Differential Cross Section, $d\sigma /d{p}_T$, in $p\bar{p}$ Collisions at $\sqrt{s}=1.8$ TeV

Abstract

This paper presents the first direct measurement of the $B$ meson differential cross section, $d\sigma /d{p}_T$, in $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV using a sample of $19.3\pm 0.7$ pb${}^{-1}$ accumulated by the Collider Detector at Fermilab (CDF). The cross section is measured in the central rapidity region $|y|<1$ for $p_T(B)>6.0$ GeV/$c$ by fully reconstructing the $B$ meson decays $B^{+}\to J/\psi K^{+}$ and $B^0\to J/\psi K^{\ast 0}(892)$, where $J/\psi \to {\mu }^{+}{\mu }^{-}$ and $K^{\ast 0}\to K^{+}{\pi }^{-}$. A comparison is made to the theoretical QCD prediction calculated at next-to-leading order.

14 pages. Submitted to Phys. Rev. Lett. The postscript file is at http://www-cdf.fnal.gov/physics/pub95/cdf2893_bexcl_xsection.ps

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• Exclusive Hadronic B Decays to Charm and Charmonium Final States

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