Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tsallis statistics approach to the transverse momentum distributions in
  p-p collisions   Transverse momentum distributions of negatively charged pions produced in p-p
interactions at beam momenta 20, 31, 40, 80 and 158 GeV/c are studied using the
Tsallis distribution as a parametrization. Results are compared with higher
energies data and changes of parameters with energy are determined. Different
Tsallis-like distributions are compared.

19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics