Gluons saturation in future accelerators

Author(s)

Erike Roberto Cazaroto

• Document type: Doctoral Thesis
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Instituto de Física (IF/SBI)
• Defense date: 2012-09-21

Examining board members

Fernando Silveira Navarra; Frederique Marie Brigitte Sylvie Grassi; Magno Valerio Trindade Machado; Márcio José Menon; Marcelo Gameiro Munhoz

• Advisor: Fernando Silveira Navarra; Victor Paulo Barros Gonçalves

Abstract

In this thesis we make predictions for the behavior of observables that will be measured in future particle colliders and also at the LHC. We address three different types of collisions: electron-ion (eA), photon-photon and proton-nucleus (pA). For eA processes we calculate the vector meson and real photon production cross section using the saturation models rcBK and b-CGC. We observe that only the production of heavy mesons will be useful to determine which saturation model correctly describes the dipole-proton interaction. For the photon-photon process we calculate the total cross section as well as the photon structure function. We propose a new saturation model for the interaction between two color dipoles and we compare its predictions with those of other models available in the literature. We observe that our model predicts a much smoother growth of the observables than the other models. As for pA collisions, we calculate the cross section of charm and bottom production at LHC energies. We observe that charm production is very sensitive to saturation effects as well as to nuclear shadowing effects. Therefore, this observable can be useful to determine the dynamics of QCD at high energies, as well as the magnitude of the shadowing. On the other hand, only the bottom production cross section is sensitive to antishadowing effect. (AU)

• FAPESP's process: 10/05819-0 - Partons Saturation Physics in the Future Accelerators
• Grantee: Erike Roberto Cazaroto
• Support Opportunities: Scholarships in Brazil - Doctorate