Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Light-front Hamiltonians for heavy quarks and gluons   A boost-invariant light-front Hamiltonian formulation of canonical quantum
chromodynamics provides a heuristic picture of the binding mechanism for
effective heavy quarks and gluons.

12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph