Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Baryon to meson transition distribution amplitudes and their spectral
  representation   We consider the problem of construction of a spectral representation for
nucleon to meson transition distribution amplitudes (TDAs), non-diagonal matrix
elements of nonlocal three quark light-cone operators between a nucleon and a
meson states. We introduce the notion of quadruple distributions and generalize
Radyshkin's factorized Ansatz for this issue. Modelling of baryon to meson TDAs
in the complete domain of their definition opens the way to quantitative
estimates of cross-sections for various hard exclusive reactions.

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The categories of this paper are: math-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph