Measurement of the b-Hadron Production Cross Section Using Decays to mu^- D^0 X Final States in ppbar Collisions at sqrt s = 1.96 TeV

TL;DR

This paper reports a precise measurement of b-hadron production cross sections in proton-antiproton collisions at 1.96 TeV, using semileptonic decay channels, and compares results with theoretical predictions.

Contribution

It provides the first measurement of the inclusive b-hadron production cross section at Tevatron energies using muon and D0 decays, with detailed uncertainties and differential cross sections.

Findings

Measured cross section: 1.30 microbarns with uncertainties.

Differential cross sections agree with NLL theoretical predictions.

Results consistent with previous measurements of b-hadron production.

Abstract

We report a measurement of the production cross section for b hadrons in p-pbar collisions at sqrt{s}=1.96 TeV. Using a data sample derived from an integrated luminosity of 83 pb^-1 collected with the upgraded Collider Detector (CDF II) at the Fermilab Tevatron, we analyze b hadrons, H_b, partially reconstructed in the semileptonic decay mode H_b -> mu^- D^0 X. Our measurement of the inclusive production cross section for b hadrons with transverse momentum p_T > 9 GeV/c and rapidity |y|<0.6 is sigma = 1.30 mub +/- 0.05 mub(stat) +/- 0.14 mub (syst) +/- 0.07 mub (B), where the uncertainties are statistical, systematic, and from branching fractions respectively. The differential cross sections dsigma/dp_T are found to be in good agreement with recent measurements of the H_b cross section and well described by fixed-order next-to-leading logarithm predictions.