Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isolated photon and photon+jet production at NNLO QCD accuracy and the
  ratio $R_{13/8}^\gamma$   We discuss different approaches to photon isolation in fixed-order
calculations and present a new next-to-next-to-leading order (NNLO) QCD
calculation of $R_{13/8}^\gamma$, the ratio of the inclusive isolated photon
cross section at 8 TeV and 13 TeV, differential in the photon transverse
momentum, which was recently measured by the ATLAS collaboration.

27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg