Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral Symmetry and Weak Decay of Hypernuclei   The weak decays of hyperons and hypernuclei are studied from the chiral
symmetry viewpoint. The soft pion relations are useful in understanding the
isospin properties of the weak hyperon decays. Recent development on the
short-range part of the $\Lam N\to NN$ weak transitions shows fairly good
account of the weak decays of hypernuclei, though it fails to explain the $n/p$
ratio. The $\pip$ decays of light hypernuclei are studied in the soft pion
approach. They are related to the $\DI=3/2$ amplitudes of the nonmesonic decay.

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The categories of this paper are: astro-ph
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: comp-gas
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The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: math
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The categories of this paper are: quant-ph