Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cross Section Constrained Top Quark Mass Measurement from Dilepton
  Events at the Tevatron   We report the first top quark mass measurement that uses a cross section
constraint to improve the mass determination. This measurement is made with a
dilepton $t\bar{t}$ event sample collected with the CDF II detector. From a
data sample corresponding to an integrated luminosity of 1.2 fb$^{-1}$, we
measure a top quark mass of $\rm{170.7^{+4.2}_{-3.9}(stat)\pm2.6(syst)}$
$\rm{\pm2.4(theory) GeV/{\it{c}}^{2}}$. The measurement without the cross
section constraint results in a top quark mass of
$\rm{169.7^{+5.2}_{-4.9}(stat)\pm3.1(syst) GeV/{\it{c}}^{2}}$.

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The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: econ
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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: physics
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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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: hep-ph
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The categories of this paper are: alg-geom