Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: From Landau's Hydrodynamical Model to Field Theory Models of
  Multiparticle Production: A Tribute to Peter Carruthers on his 61st Birthday   We review the assumptions and domain of applicability of Landau's
Hydrodynamical Model. By considering two models of particle production, pair
production from strong electric fields and particle production in the linear
sigma model, we demonstrate that many of Landau's ideas are verified in
explicit field theory calculations.

16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org