Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of Cross Sections for $b$ Jet Production in Events with a
  $Z$ Boson in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV   A measurement of the $\bjet$ production cross section is presented for events
containing a $Z$ boson produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$
TeV, using data corresponding to an integrated luminosity of 2 fb$^{-1}$
collected by the CDF II detector at the Tevatron. $Z$ bosons are selected in
the electron and muon decay modes. Jets are considered with transverse energy
$E_T>20$ GeV and pseudorapidity $|\eta|<1.5$ and are identified as $\bjets$
using a secondary vertex algorithm. The ratio of the integrated $Z+\bjet$ cross
section to the inclusive $Z$ production cross section is measured to be $3.32
\pm 0.53 {\rm (stat.)} \pm 0.42 {\rm (syst.)}\times 10^{-3}$. This ratio is
also measured differentially in jet $E_T$, jet $\eta$, $Z$-boson transverse
momentum, number of jets, and number of $\bjets$. The predictions from leading
order Monte Carlo generators and next-to-leading-order QCD calculations are
found to be consistent with the measurements within experimental and
theoretical uncertainties.

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The categories of this paper are: hep-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
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The categories of this paper are: nucl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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The categories of this paper are: physics
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin