Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bose-Einstein correlations in one and two dimensions in deep inelastic
  scattering   Bose-Einstein correlations in one and two dimensions have been studied in
deep inelastic EP scattering events measured with the ZEUS detector at HERA
using an integrated luminosity of 121 pb-1. The correlations are independent of
the virtuality of the exchanged photon, Q2, in the range 0.1<Q2<8000 GeV2.
There is no significant difference between the correlations in the current and
target regions of the Breit frame for Q2>100 GeV2. The two-dimensional shape of
the particle-production source was investigated, and a significant difference
between the transverse and the longitudinal dimensions of the source is
observed.This difference also shows no Q2 dependence.The results demonstrate
that Bose-Einstein interference, and hence the size of the particle-production
source, is insensitive to the hard subprocess.

2
The categories of this paper are: math
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph