Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized Parton Distributions of the Photon for Nonzero zeta   We present a calculation of the generalized parton distributions of the
photon when there is non-zero momentum transfer both in the transverse and
longitudinal directions. We consider only the contributions when the photon
helicity is not flipped and calculate those at leading order in electromagnetic
coupling $\alpha$ and zeroth order in the strong coupling $\alpha_s$. We keep
the leading logarithmic terms as well as the quark mass terms in the vertex. By
taking Fourier transforms of the GPDs with respect to the transverse and
longitudinal momentum transfer, we obtain the parton distributions of the
photon in position space.

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The categories of this paper are: q-fin
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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: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ