Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some problems in plasma suppression of beam-beam interactions at muon
  colliders   The idea of plasma suppression of beam-beam effects at muon colliders is
discussed. It is shown that one should take into account collisions in the
plasma that were ignored before. Rough estimates show that this effect leads to
a fast ``recovery'' of the beam magnetic field. For beam parameters
characteristic for muon colliders the suppression of the magnetic component of
the beam field (1/2 of the total force) is almost absent. It is also shown that
the presence of the dense plasma (Li jet) at the interaction point leads to
enormous hadronic background (due to photo-nuclear reactions) in the detector,
about 10^{7} particles per crossing at large angles which creates serious
problems for experimentation.

9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc