Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multidimensional HBT correlations in proton-antiproton collisions at
  root(s) = 630 GeV   We analyse second moments $R_2$ of like-sign pion pairs in the
two-dimensional $(q_L,q_T)$ and three-dimensional $(q_O,q_S,q_L)$
decompositions of the three-momentum difference. Conventional fit
parametrisations such as gaussian, exponential, power-law and Edgeworth fail
miserably, while more elaborate ones such as Levy do well but fail to yield a
unique best-fit solution. A two-component model using a hard cut to separate
small- and large-scale parts appears possible but not compelling. In all cases,
the data exhibits a strong and hitherto unexplained peak at small momentum
differences which exceeds current fits.

37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
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
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph