Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: BRST Quantization of 2d-Yang Mills Theory with Anomalies   In this paper we discuss the BRST-quantization of anomalous 2d-Yang Mills
(YM) theory. Since we use an oscillator basis for the YM-Fock-space the anomaly
appears already for a pure YM-system and the constraints form a Kac-Moody
algebra with negative central charge. We also discuss the coupling of chiral
fermions and find that the BRST-cohomology for systems with chiral fermions in
a sufficiently large representation of the gauge group is completely equivalent
to the cohomology of the finite dimensional gauge group. For pure YM theory or
YM theory coupled to chiral fermions in small representations there exists an
infinite number of inequivalent cohomology classes. This is discussed in some
detail for the example of $SU(2)$.

11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
9
The categories of this paper are: nlin