Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Critical Look at $\gamma$ Determinations from $B\to\pi K$ Decays   The determination of the angle $\gamma$ of the unitarity triangle of the CKM
matrix is a challenge for the $B$-factories. In this context, $B\to\pi K$
decays received a lot of attention, providing various interesting ways to
constrain and determine $\gamma$. These strategies are briefly reviewed, and
their virtues and weaknesses are compared with one another.

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The categories of this paper are: hep-ex
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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: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn