• A dependence of hadron-nucleus massive lepton pair production 

      Ayala Filho, Alvaro Leonardi; Gay Ducati, Maria Beatriz; Epele, Luis N.; Canal, Carlos Alberto Garcia (1994) [Artigo de periódico]
      Nuclear effects in the small x region of hadron-nucleus Drell-Yan processes at 800 GeV are analyzed. We employ the parton recombination model to describe the suppression in the RpA DY(x₂)ratio and we compare it with REMC(x), ...
    • Determination of small x shadowing corrections at DESY HERA 

      Ayala Filho, Alvaro Leonardi; Gay Ducati, Maria Beatriz; Goncalves, Victor Paulo Barros (1999) [Artigo de periódico]
      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 ...
    • QCD evolution of the gluon density in a nucleus 

      Ayala Filho, Alvaro Leonardi; Gay Ducati, Maria Beatriz; Levin, Eugene Marcovich (1997) [Artigo de periódico]
      The Glauber approach to the gluon density in a nucleus, suggested by A. Mueller, is developed and studied in detail. Using the GRV parameterization for the gluon density in a nucleon, the value as well as energy and Q2 ...
    • Scaling violation and shadowing corrections at HERA 

      Ayala Filho, Alvaro Leonardi; Gay Ducati, Maria Beatriz; Levin, E.M. (1999) [Artigo de periódico]
      We study the value of shadowing corrections (SC) in the HERA kinematic region in the Glauber{ Mueller approach. Since the Glauber{Mueller approach was proven in perturbative quantum chromodynamics (QCD) in the double-logarithmic ...
    • Unitarity boundary for deep inelastic structure functions 

      Ayala Filho, Alvaro Leonardi; Gay Ducati, Maria Beatriz; Levin, Eugene Marcovich (1996) [Artigo de periódico]
      In this letter we derive the unitarity boundaries in QCD for the deep inelastic structure function in low x kinematic region: the Froissart boundary and a more restricted one, linked with experiment and based on additional ...