Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bose-Einstein correlations of two identical particles through their
  first measurements by CMS at the LHC   We look at the new two-particle correlation function that can provide the
space-time information about the source of two charged pions. This function
clearly reflects the chaotic and incoherent nature of the particle emission
source disturbed by external forces (fields). We argue that such an investiga-
tion could probe the size and the temperature of the expanded source where two
pions are emitted in thermal environment.

19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph