Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lifetime Difference and CP-Violating Phase in the B_s^0 System   From an analysis of the decay Bs -> J/psi phi we obtain the width difference
between the light and heavy mass eigenstates, and the CP-violating phase.

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The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: math
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The categories of this paper are: hep-th