Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Tensor Pomeron and Small-x Deep Inelastic Scattering   We apply the tensor-pomeron model to small-$x$ deep-inelastic lepton-proton
scattering and photoproduction. Our model includes a soft and a hard tensor
pomeron as well as a reggeon contribution. Data with c.m. energies $6 <
\sqrt{s} < 318$ GeV and virtualities $Q^2 < 50 \,\mbox{GeV}^2$ are considered.
Our fit gives a very good description of the available data in this kinematic
region, including the latest HERA data for $x < 0.01$. In particular, the
transition region from low to high $Q^2$ is well described. Within the errors,
the hard pomeron is absent in photoproduction. The intercepts of the soft and
hard pomeron in the two-tensor-pomeron model are found to be $1.0935\,
({}^{+76}_{-64})$ and $1.3008 \,({}^{+73}_{-84})$, respectively. We argue that
a vector pomeron would not give any contribution to photoproduction.

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The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
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The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph