Implicações fenomenológicas do processo de duplo espalhamento partônico no Grande Colisor de Hádrons

Abstract

One of high the main sources of information about the hadron structure is the scattering processes between. One classic example is the deep inelastic scattering between electrons and protons, demonstrating that protons are made by quarks and gluons, denoted partons. Currently, our understanding about the matter and its interactions is being tested in proton-proton collisions at the Large Hadron Collider (LHC) in a range of energies. Differently from previous colliders, where the cross sections can be estimated assuming that the dominant interaction occurs between one parton of the projectile and one parton of the target, named Single Parton Scattering processes (SPS), in the LHC the contribution of double parton scattering (DPS) processes becomes no negligible due to the high parton luminosity in the initial state of the collision. Our goal in this dissertation is the study of the phenomenological implications of the double parton scattering processes (DPS) for di erent nal states. In particular, we estimate the double production of dileptons, gauge boson, heavy quark pairs and quarkonium in proton-proton collisions at LHC, aswellas the mixed prodution of these di erent nal states. Our results demostrate that the contribution of the DPS processes is important when the nal state is generated by partonic interactions with a gluon in the initial state and that these processes could be studied at the LHC.