Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonperturbative Dynamics of Hadronic Collisions   In the last couple of years, the LHC has released precise measurements of
elastic proton-proton scattering which has become an important guide in the
search for selecting phenomenological models and theoretical approaches to
understand, in a deeper level, the theory of strong interactions. In this
thesis, through the formulation of two models compatible with analyticity and
unitarity constraints, we study some aspects concerning the Physics behind
hadronic interactions. In particular, we investigate the proton-proton and the
antiproton-proton elastic scattering at high energies using a Regge
theory-based model, where the increase of the total cross section is attributed
to the exchange of a colorless state having the quantum numbers of the vacuum,
and using a model based on the Quantum-Chromodynamics-improved parton model,
where the increase of the total cross section is in turn associated with
semihard scatterings of partons in the hadrons.

2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio