Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Little Bang: Searching for quark-gluon matter in relativistic
  heavy-ion collisions   I review the status of the search for quark-gluon plasma in relativistic
heavy-ion collisions. The available data provide strong evidence for the "three
pillars of the Little Bang model": strong radial expansion of the collision
fireball with Hubble-like scaling, thermal hadron emission and primordial
hadrosynthesis. It is argued that the initial state of the reaction zone
exhibits features which cannot be understood with conventional hadronic
dynamics, but are consistent with the formation of deconfined quark-gluon
matter.

37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio