Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relation between Wigner functions and the source functions used in the
  description of Bose-Einstein correlations in multiple particle production   Relations between Wigner functions and the source functions used in models of
Bose-Einstein correlations in multiple particle production are derived and
discussed. These relations are model dependent. In particular it is important
whether the particles are emitted simultaneously and if not, whether the
production amplitudes corresponding to different moments of time can interfere
with each other.

15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex