Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the ttbar Production Cross Section in ppbar Collisions at
  sqrt(s)=1.96 TeV using Soft Electron b-Tagging   We present a measurement of the top quark pair production cross section in
ppbar collisions at sqrt(s)=1.96 TeV using a data sample corresponding to
1.7/fb of integrated luminosity collected with the Collider Detector at
Fermilab. We reconstruct ttbar events in the lepton+jets channel. The dominant
background is the production of W bosons in association with multiple jets. To
suppress this background, we identify electrons from the semileptonic decay of
heavy-flavor jets. We measure a production cross section of 7.8 +/- 2.4 (stat)
+/- 1.6 (syst) +/- 0.5 (lumi) pb. This is the first measurement of the top pair
production cross section with soft electron tags in Run II of the Tevatron.

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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: math
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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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: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ph