Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: {Probing Colour Separate States in $e^+ e^-$ annihilation at $Z^0$ pole   Hadronic events in $e^+ e^- \to Z^0$ are generated by a Monte-Carlo model
including the production of colour separate states. These events are compared
with those produced by the JETSET with default set of parameters where the
colour connections are colour singlet chains. By selecting two-jet-like events
and a sensitive observable, we find that these two kinds of colour connections
lead to significant differences in the hadronic states.

11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin