Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Delta I = 1/2 enhancement and the Glashow-Schnitzer-Weinberg sum rule   In 1967 Glashow, Schnitzer and Weinberg derived a sum rule in the soft-pion
and soft kaon limit relating the Delta I=1/2 non-leptonic K->2pi amplitude to
integrals over strange and non-strange spectral functions. Using the recent
ALEPH data from tau-decay, we show that the sum rule, slightly modified to
reduce contributions near the cut, yields the correct magnitude decay amplitude
corresponding to the Delta I=1/2 rule.

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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: math
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex