Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Production of large rapidity gap events in ep interactions at HERA   This is a short review of the properties of electron proton interactions
characterized by the presence of large rapidity gaps (LRG) in the measured
hadronic final state as obtained by the ZEUS Collaboration at the HERA
Collider. In the deep inelastic neutral current $ep$ interactions, the
factorization properties of the LRG events interpreted as due to the
diffractive dissociation of the virtual photon are compatible with expectations
from the Regge phenomenology of soft interactions. The measurement of deep
inelastic scattering combined with results from photoproduction of high $p_T$
jets are successfully interpreted in terms of a factorizable Pomeron consisting
of quarks and with a substantial contribution of a gluonic component. The first
hints of a more complicated nature of the Pomeron are observed in the deep
inelastic exclusive $\rho^o$ production, where a strong increase of the
production cross section with energy is observed relative to the measurements
of the NMC Collaboration at lower energy.

4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th