Produção de fótons em colisões harmônicas no LHC como uma prova da dinâmica de interações fortes

Abstract

The description of the proton structure in the high-energy region is still unknown, but it is known that in this region, gluons are the predominant constituents of hadron. The gluonic content in the high energy regime is determined by the dynamics of strong interactions. We can investigate this region through the study of the production of photons isolated in hadronic collisions, whose cross section is dominated by the Compton scattering process, thus being strongly dependent on the distribution of gluons. In this work, we investigate the impact of the nonlinear effects of the dynamics of strong interactions on the production of isolated photons produced in proton-proton and proton-nucleus collisions in the RHIC and LHC accelerators. The dipole formalism for the production of isolated photons is presented and the transverse momentum distribution is estimated for different models for dipole-target scattering amplitude. In addition, we estimate the photon-hadron angular correlation function, which can be analyzed experimentally, and demonstrate that it is sensitive to the presence and magnitude of non-linear effects.