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We study the contribution of a truncated BFKL Pomeron series to the hadronic processes showing that a reliable description is obtained using two orders in perturbation theory. The pp(ppÌ„) total cross sections are described with good agreement, consistent with the unitarity bound. We also calculate the elastic scattering amplitude at non zero momentumâ€¦ (More)

- C. B. MARIOTTO, Maria Beatriz Gay Ducati, Gunnar Ingelman
- 2000

We show that both hard perturbative and soft non-perturbative QCD effects are important in hadroproduction of charmonium. Observed x F and p âŠ¥ distributions of J/Ïˆ in fixed target experiments can be well described by our Monte Carlo model based on perturbative QCD and the Color Evaporation Model. Aiming at an understanding of non-perturbative QCDâ€¦ (More)

The AGL equation includes all multiple pomeron exchanges in the double logarithmic approximation (DLA) limit, leading to an unitarized gluon distribution in the small x regime. This equation was originally obtained using the Glauber-Mueller approach. We demonstrate in this paper that the AGL equation and, consequently, the GLR equation, can also be obtainedâ€¦ (More)

- C. BRENNER MARIOTTO, Maria Beatriz Gay Ducati, Gunnar Ingelman
- 2002

We discuss the relative rates of different charmonium states and introduce an improved model for mapping the continuous cÂ¯ c mass spectrum on the physical charmonium resonances. The theoretical description of charmonium production separates the hard and soft parts of the process based on the factorisation theorem in QCD. Perturbative QCD (pQCD) should beâ€¦ (More)

The modifications induced in the calculation of the cross section of the diffractive process Î³Î³ â†’ J/Î¨J/Ïˆ when the gluon propagator is changed are analyzed. Instead of the usual perturbative gluon propagator, alternative forms obtained using non-perturbative methods like Dyson-Schwinger equations are used to consider in a more consistent way theâ€¦ (More)

- Maria Beatriz Gay Ducati, K. Kontros, Alexander Lengyel, V. T. Machado
- 2001

Electroproduction in deep inelastic scattering at HERA is studied in a model considering a finite sum of gluon ladders, associated with a truncation of the BFKL series. The approach contains the bare two gluon exchange and both one and two rungs contributions and the resulting structure function does not violate the asymptotic behavior stated by theâ€¦ (More)

- Maria Beatriz Gay Ducati, C. B. Mariotto
- 1999

Our goal is the study of color effects on the J/Ïˆ and D mesons production, as well as the study of their elastic production.We use the Color Evaporation Model (CEM), where a single factor takes into account the probability that the cc produced in a color octet state turns into a physical (colorless) quarkonium or continues as a color octet, producing openâ€¦ (More)

We present an exploratory QCD analysis of the neutrino structure functions in charged current DIS using the color dipole formalism. The corresponding dipole cross sections are taken from recent phenomenological/theoretical studies in deep inelastic inclusive production. The theoretical predictions are compared to the available experimental results in theâ€¦ (More)

In the XXIV ENFPC were presented one plenary talk, three parallel talks, 15 oral communications and 27 posters on Phenomenology. The research on phenomenology presented at XXIV ENFPC could be divided in some main domains: extensions of the standard model and searches; heavy quarks production, and models; high density QCD and nuclear dependence and models;â€¦ (More)