Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimizing the parton shower model in PYTHIA with pp collision data at
  $\sqrt{s}$ = 13 TeV   Production of quarks and gluons in hadron collisions tests Quantum
Chromodynamics (QCD) over a wide range of energy. Models of QCD are implemented
in event generators to simulate hadron collisions and evolution of quarks and
gluons into jets of hadrons. PYTHIA8 uses the parton shower model for
simulating particle collisions and is optimized using experimental
observations. Recent measurements of event shape variables and jet
cross-sections in pp collisions at $\sqrt{s}$ = 13 TeV at the Large Hadron
Collider have been used to optimize the parton shower model as used in PYTHIA8.

19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph