Navegação Ciências Exatas e da Terra por Autor "Machado, Magno Valério Trindade"
Resultados 41-60 de 80
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Investigating the diffractive gluon jet production in lepton-ion collisions
Peccini, Guilherme Müller; Moriggi, Lucas Soster; Machado, Magno Valério Trindade (2020) [Artigo de periódico]We study the diffractive jet production in electron-ion collisions in the kinematic region where the mass MX of the diffractive final state is larger than Q2. Based on parton saturation framework, predictions are done for ... -
Investigating the Drell-Yan transverse momentum distribution in the color dipole approach
Silva, Marcos André Betemps Vaz da; Gay Ducati, Maria Beatriz; Machado, Magno Valério Trindade; Raufeisen, J. (2003) [Artigo de periódico]We study the influence of unitarity corrections on the Drell-Yan transverse momentum distribution within the color dipole approach. These unitarity corrections are implemented through the multiple scattering Glauber- Mueller ... -
Investigating the inclusive transverse spectra in high-energy pp collisions in the context of geometric scaling framework
Moriggi, Lucas Soster; Peccini, Guilherme Müller; Machado, Magno Valério Trindade (2020) [Artigo de periódico]The presence of geometric scaling within the pT spectra of produced hadrons at high energy pp collisions using small-x kT-factorization is investigated. It is proposed a phenomenological parameterization for the unintegrated ... -
Investigating the QCD dynamical entropy in high-energy hadronic collisions
Ramos, Gabriel Silveira; Machado, Magno Valério Trindade (2022) [Artigo de periódico]The dynamical entropy of dense gluonic states in proton-proton collisions at high energies is studied by using phenomenological models for the unintegrated gluon distribution. The corresponding transverse momentum probability ... -
Investigating the soft processes within the QCD color dipole picture
Machado, Magno Valério Trindade (2019) [Artigo de periódico]We consider the QCD parton saturation models to describe the soft interactions at the high-energy limit. The total and elastic cross-sections, as well as the elastic slope parameter, are obtained for proton-proton and ... -
Light vector meson photoproduction in hadron-hadron and nucleus-nucleus collisions at energies available at the CERN Large Hadron Collider
Santos, Glauber Sampaio dos; Machado, Magno Valério Trindade (2015) [Artigo de periódico]In this work we analyze the theoretical uncertainties on the predictions for the photoproduction of light vector mesons in coherent pp, pA, and AA collisions at the CERN Large Hadron Collider energies using the color dipole ... -
Neutral current neutrino-nucleus interactions at high energies
Gay Ducati, Maria Beatriz; Machado, Mairon Melo; Machado, Magno Valério Trindade (2009) [Artigo de periódico]We present a QCD analysis of the neutral current (NC) neutrino-nucleus interaction at the small-x region using the color dipole formalism. This phenomenological approach is quite successful in describing experimental results ... -
Neutrino structure functions in the QCD dipole picture
Gay Ducati, Maria Beatriz; Machado, Mairon Melo; Machado, Magno Valério Trindade (2007) [Artigo de periódico]In this contribution 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 ... -
Non-linear QCD dynamics and exclusive production in ep collisions
Goncalves, Victor Paulo Barros; Machado, Magno Valério Trindade; Meneses, Anelise Ramires (2010) [Artigo de periódico]The exclusive processes in electron–proton (ep) interactions are an important tool to investigate the QCD dynamics at high energies as they are in general driven by the gluon content of proton which is strongly subject to ... -
Nuclear charm and bottom production : a comparison among high energy approaches
Goncalves, Victor Paulo Barros; Machado, Magno Valério Trindade (2004) [Artigo de periódico]We calculate the nucleon and nuclear photoproduction cross sections for heavy quarks within the k⊥-factorization formalism, considering the current high energy approaches which include nuclear and saturation effects. Our ... -
Nuclear exclusive vector meson photoproduction
Goncalves, Victor Paulo Barros; Machado, Magno Valério Trindade (2004) [Artigo de periódico]We calculate the nuclear cross section for vector meson exclusive photoproduction within the QCD color dipole picture and in the Regge approach. For the former approach, we have considered the phenomenological saturation ... -
Nuclear heavy quark photoproduction in a saturation model
Goncalves, Victor Paulo Barros; Machado, Magno Valério Trindade (2003) [Artigo de periódico]We calculate the nuclear inclusive and diffractive cross sections for heavy quark photoproduction within a phenomenological saturation approach. The nuclear cross section is obtained by the extension of the saturation model ... -
Nuclear modification factor in small system collisions within perturbative QCD including thermal effects
Moriggi, Lucas Soster; Machado, Magno Valério Trindade (2022) [Artigo de periódico]In this paper, the nuclear modification factors, RxA, are investigated for pion production in small system collisions, measured by PHENIX experiment at RHIC (Relativistic Heavy Ion Collider). The theoretical framework is ... -
Parton saturation scaling function for exclusive production of vector mesons and deeply virtual Compton scattering
Ben, Felipe Gregoletto; Machado, Magno Valério Trindade; Sauter, Werner Krambeck (2017) [Artigo de periódico]We provide a universal expression of cross sections for the exclusive vector meson production and deeply virtual Compton scattering (DVCS) in photon-proton and photon-nucleus interactions based on the geometric scaling ... -
A phenomenological analysis of the longitudinal structure function at small x and low Q2
Goncalves, Victor Paulo Barros; Machado, Magno Valério Trindade (2004) [Artigo de periódico]The longitudinal structure function in deep-inelastic scattering is one of the observables from which the gluon distribution can be unfolded. Consequently, this observable can be used to constrain the QCD dynamics at small ... -
Phenomenology of f0(980) photoproduction on the proton at energies measured with the CLAS facility
Silva, Mario Luiz Lopes da; Machado, Magno Valério Trindade (2013) [Artigo de periódico]In this work we present the results of a theoretical analysis of the data on photoproduction of the f₀(980) meson in the laboratory photon energy between 3.0 and 3.8 GeV. A comparison is done to the measurements performed ... -
Photon plus heavy-quark production in high-energy collisions within the target rest frame formalism
Silva, Marcos André Betemps Vaz da; Machado, Magno Valério Trindade (2010) [Artigo de periódico]We apply the target rest frame formalism to photon þ heavy quark production cross section in hadronic collisions at high energies. We investigate the dependence of the production cross section on the photon and quark ... -
Photoproduction of upsilon states in ultraperipheral collisions at the CERN Large Hadron Collider within the color dipole approach
Gay Ducati, Maria Beatriz; Nóbrega, Fábio Köpp; Machado, Magno Valério Trindade; Martins, Sony (2016) [Artigo de periódico]The exclusive photoproduction of upsilon state ϒð1SÞ and its radially excited states ϒð2S; 3SÞ is investigated in the context of ultraperipheral collisions at the LHC energies. Predictions are presented for their production ... -
Prompt photon production in high-energy pA collisions at forward rapidity
Santos, Glauber Sampaio dos; Silveira, Gustavo Gil da; Machado, Magno Valério Trindade (2020) [Artigo de periódico]Prompt photon production in hadronic collisions at energies available at RHIC and at the LHC is investigated within the QCD color dipole approach. Predictions for the nuclear modification factor in pA collisions are evaluated ... -
QCD evolution and skewedness effects in color dipole description of DVCS
Favart, Laurent; Machado, Magno Valério Trindade (2004) [Artigo de periódico]We show the role played by QCD evolution and skewedness effects in the DVCS cross section at large Q2 within the color dipole description of the process at photon level. The dipole cross section is given by the saturation ...