Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Perturbative Calculations of Gravitational Form Factors at Large
  Momentum Transfer   We perform a perturbative QCD analysis of the gravitational form factors
(GFFs) of nucleon at large momentum transfer. We derive the explicit
factorization formula of the GFFs in terms of twist-3 and twist-4 light-cone
distribution amplitudes of nucleon. Power behaviors for these GFFs are obtained
from the leading order calculations. Numeric results of the quark and gluon
contributions to various GFFs are presented with model assumptions for the
distribution amplitudes in the literature. We also present the perturbative
calculations of the scalar form factor $\langle P'|F^2| P\rangle$ for pion and
proton at large momentum transfer.

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The categories of this paper are: q-bio
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The categories of this paper are: physics
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: chem-ph