Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: BLM scale for the pion transition form factor   We review the determination of the NLO Brodsky-Lepage-Mackenzie (BLM)
renormalization scale for the pion transition form factor. We argue that the
prediction for the pion transition form factor is independent of the
factorization scale at every order in the strong coupling constant.

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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: hep-th
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The categories of this paper are: cs
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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: stat
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph