Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Leading Large N Modification of QCD_2 on a Cylinder by Dynamical
  Fermions   We consider 2-dimensional QCD on a cylinder, where space is a circle. We find
the ground state of the system in case of massless quarks in a $1/N$ expansion.
We find that coupling to fermions nontrivially modifies the large $N$ saddle
point of the gauge theory due to the phenomenon of `decompactification' of
eigenvalues of the gauge field. We calculate the vacuum energy and the vacuum
expectation value of the Wilson loop operator both of which show a nontrivial
dependence on the number of quarks flavours at the leading order in $1/N$.

22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex