Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strong and Electromagnetic Forces in Heavy Ion Collisions   The interplay between the strong and electromagnetic force in high energy
nucleus-nucleus collisions was studied experimentally and theoretically in our
earlier works. This effect appeared to result in very large distortions in
spectra of charged pions produced in the collision. It was also found to bring
new, independent information on the space-time evolution of the
non-perturbative process of particle production.
  In this paper, we present our new results on the influence of the
spectator-induced electromagnetic force on spectra of charged particles
produced in two different Pb-induced reactions. For the first time, we also
address the topic of p+A collisions in view of obtaining information about
their centrality and nuclear break-up, both subjects being of importance in the
context of the new p+A data collected at the LHC.

32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol