Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The sigma and rho in D and B decays   We study the D^{+} -> sigma pi^{+}, D^{+} -> rho^0 pi^{+}, B^{-} -> sigma
pi^{-}, B^{-} -> rho^0 pi^{-} and \bar{B}^0 -> rho^{\pm} pi^{\mp} decays in a
valence quark triangle model, incorporating chiral symmetries. We find a good
agreement with recent experimental data for D^{+} -> sigma pi^{+} and for D^{+}
-> rho^0 pi^{+}. We point out that a "long-distance" contribution due to the
axial vector a_1 meson pole, calculated by using chiral symmetry, can be
relevant to explain D^{+}-> rho^0 \pi^{+} and for lowering the ratio
R=Br(\bar{B}^0 -> rho^{\pm} pi^{\mp})/Br(B^{-} -> rho^0 pi^{-}) to be
consistent with its phenomenological determination, within the large
experimental uncertainity.

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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: physics
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The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: q-bio
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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: q-alg
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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol