Browsing Exact and Earth Sciences by Subject "Modelo de partons"

Now showing items 1-7 of 7

    • Constraining the free parameter of the high parton density effects 

      Gay Ducati, Maria Beatriz; Goncalves, Victor Paulo Barros (2000) [Journal article]
      The high parton density effects are strongly dependent of the spatial gluon distribution within the proton, with radius R, which cannot be derived from perturbative QCD. In this paper we assume that the unitarity corrections ...

    • Determination of small x shadowing corrections at DESY HERA 

      Ayala Filho, Alvaro Leonardi; Gay Ducati, Maria Beatriz; Goncalves, Victor Paulo Barros (1999) [Journal article]
      The recent F2 data can be described using the DGLAP evolution equations with an appropriate choice of input distributions and the choice of the starting scale for the Q2 evolution. We demonstrate in this paper that we ...

    • Energy-dependent dipole form factor in a QCD-inspired model 

      Bahia, Carlos Andre da Silva; Rocha, Mateus Broilo da; Luna, Emerson Gustavo de Souza (2016) [Journal article]

    • Estimations for the Higgs boson production with QCD and EW corrections in exclusive events at the LHC 

      Gay Ducati, Maria Beatriz; Silveira, Gustavo Gil da (2011) [Journal article]
      The Higgs boson production is investigated in proton-proton collisions at next-to-leading-order accuracy in central exclusive diffractive processes at the LHC. The production process by the double Pomeron exchange is ...

    • Inclusive and exclusive dilepton photoproduction at high energies 

      Mariotto, Cristiano Brenner; Machado, Magno Valério Trindade (2013) [Journal article]
      In this work we investigate the inclusive and exclusive photoproduction of dileptons, which is relevant for the physics programme to be studied in the proposed electron-proton collider, the LHeC. In the inclusive case, the ...

    • Nonperturbative QCD effects in forward scattering at the LHC 

      Bahia, Carlos Andre da Silva; Rocha, Mateus Broilo da; Luna, Emerson Gustavo de Souza (2015) [Journal article]
      We study infrared contributions to semihard parton-parton interactions by considering an effective charge whose finite infrared behavior is constrained by a dynamical mass scale. Using an eikonal QCDbased model in order ...

    • Soft and hard QCD dynamics in hadroproduction of charmonium 

      Mariotto, Cristiano Brenner; Gay Ducati, Maria Beatriz; Ingelman, Gunnar (2002) [Journal article]
      Both hard and soft QCD dynamics are important in charmonium production, as presented here through a next-to-leading order QCD matrix element calculation combined with the color evaporation model. The observed xF and p⊥ ...