Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the Mass of the D0 Meson   We report a measurement of the D0 meson mass using the decay chain D*(2010)+
-> D0 pi+ with D0 -> K- K- K+ pi+. The data were recorded with the BaBar
detector at center-of-mass energies at and near the Y(4S) resonance, and
correspond to an integrated luminosity of approximately 477 1/fb. We obtain
m(D0) = (1864.841 +- 0.048 +- 0.063) MeV, where the quoted errors are
statistical and systematic, respectively. The uncertainty of this measurement
is half that of the best previous measurement.

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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: q-bio
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys