Navegação Ciências Exatas e da Terra por Autor "Machado, Magno Valério Trindade"
Resultados 1-20 de 81
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Analysis of the photoproduction of massive gauge bosons at the LHeC
Mariotto, Cristiano Brenner; Machado, Magno Valério Trindade (2012) [Artigo de periódico]In this work we investigate the photoproduction of massive gauge bosons, W± and Zº, as part of relevant physics topics to be studied in the proposed electron-proton collider, the Deep Inelastic Electron- Nucleon Scattering ... -
Aspects of the unitarized soft multipomeron approach in DIS and diffraction
Gay Ducati, Maria Beatriz; Ferreiro, E.G.; Machado, Magno Valério Trindade; Salgado, C.A. (2002) [Artigo de periódico]We studyin detail the main features of the unitarized Regge model (CFKS), recentlyprop osed to describe the small-Q2 domain. It takes into account a two-component description with two types of unitarized contributions: one ... -
Asymptotic gluon density within the color dipole picture in light of HERA high-precision data
Fagundes, Daniel Almeida; Machado, Magno Valério Trindade (2023) [Artigo de periódico]We present an analysis of the most precise set of Hadron-Electron Ring Accelerator (HERA) data within the color dipole formalism, by using an analytical gluon density, based on the double-logarithm approximation of the ... -
Central exclusive χc,bproduction at high energy colliders and gluon saturation approach
Nóbrega, Fábio Köpp; Gay Ducati, Maria Beatriz; Machado, Magno Valério Trindade (2020) [Artigo de periódico]The central exclusive production of χcand χbat the LHC, RHIC and Tevatron energies is analyzed, using the recent unintegrated parton distribution (UGDs) functions available in the package TMDlib. Comparison with data is ... -
Charm and bottom production in inclusive double Pomeron exchange in heavy-ion collisions at energies available at the CERN Large Hadron Collider
Gay Ducati, Maria Beatriz; Machado, Mairon Melo; Machado, Magno Valério Trindade (2011) [Artigo de periódico]The inclusive double Pomeron exchange cross section for heavy-quark pair production is calculated for nucleus-nucleus collisions at the Large Hadron Collider. The present estimate is based on hard diffractive factorization, ... -
Charmed meson production based on dipole transverse momentum representation in high energy hadron-hadron collisions available at the LHC
Santos, Glauber Sampaio dos; Silveira, Gustavo Gil da; Machado, Magno Valério Trindade (2023) [Artigo de periódico]The production of D-mesons in high-energy pp collisions at the LHC kinematic regime is analyzed with the color dipole approach in the momentum representation. We present predictions for the Dmeson differential cross section ... -
Charm production in diffractive deep inelastic scattering
Goncalves, Victor Paulo Barros; Machado, Magno Valério Trindade (2004) [Artigo de periódico]The diffractive open charm production is computed in perturbative QCD formalism and in the Regge approach. The results are compared with recent data on charm diffractive structure function measured at DESY–HERA. Our results ... -
Coherent and incoherent production of vector mesons in ultraperipheral collisions of xenon ions within the QCD parton saturation approach
Nóbrega, Fábio Köpp; Machado, Magno Valério Trindade (2018) [Artigo de periódico]In this paper, we analyze the exclusive vector meson photoproduction in the recent run using xenon ions at energy of 5.44 TeV performed by the Large Hadron Collider. We focus on the ultraperipheral collisions and provide ... -
Coherent and incoherent Upsilon production in ultraperipheral collisions at the Large Hadron Collider
Gay Ducati, Maria Beatriz; Nóbrega, Fábio Köpp; Machado, Magno Valério Trindade (2017) [Artigo de periódico]The exclusive photoproduction of ϒðnSÞ states was calculated in ultraperipheral collisions for coherent and incoherent process in PbPb at sNN p ¼ 5.5 TeV. Different dipole models were compared in the theoretical framework ... -
Coherent photon-hadron interactions in pA collisions : small-x physics after HERA
Goncalves, Victor Paulo Barros; Machado, Magno Valério Trindade (2006) [Artigo de periódico]In this paper we study the photoproduction of heavy quarks and vector mesons in the coherent proton-nucleus (pA) interactions for RHIC and LHC energies and analyze if these processes can be used to determine the QCD dynamics ... -
Color dipole predictions for the exclusive vector meson photoproduction in pp, pPb, and PbPb collisions at run 2 LHC energies
Goncalves, Victor Paulo Barros; Machado, Magno Valério Trindade; Moreira, Bruno Duarte da Silva; Navarra, Fernando Silveira; Santos, Glauber Sampaio dos (2017) [Artigo de periódico]In this paper we present a comprehensive analysis of exclusive vector-meson photoproduction in pp, pPb and PbPb collisions at Run 2 LHC energies using the color dipole formalism. The rapidity distributions and total cross ... -
Coulomb corrections to inclusive cross sections at the future Electron-Ion Collider
Goncalves, Victor Paulo Barros; Machado, Magno Valério Trindade; Navarra, Fernando Silveira; Pires, Diego Spiering (2018) [Artigo de periódico]The experimental results of the future Electron-Ion (eA) Collider are expected to constrain the dynamics of the strong interactions at small values of the Bjorken x variable and large nuclei. Recently it has been suggested ... -
Deeply virtual Compton scattering and saturation approach
Favart, Laurent; Machado, Magno Valério Trindade (2003) [Artigo de periódico]We investigate the deeply virtual Compton scattering (DVCS) in the color dipole approach, implementing the dipole cross section through the saturation model, which interpolates successfully between soft and hard regimes. ... -
Describing F/sub 2/ through s finite sum of gluon ladders
Gay Ducati, Maria Beatriz; Kontros, K.; Lengyel, Alexander I.; Machado, Magno Valério Trindade (2002) [Artigo de periódico]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 ... -
Determination of entanglement entropy in elastic scattering using the model-independent method for hadron femtoscopy
Ramos, Gabriel Silveira; Machado, Magno Valério Trindade (2020) [Artigo de periódico]The entanglement entropy of two-body elastic scattering at high energies is studied by using the modelindependent Lévy imaging method for investigating the hadron structure. It is considered the finite entropy in the ... -
Diffractive hadroproduction of W/sup +-/ and Z /sub 0/ bosons at high energies
Gay Ducati, Maria Beatriz; Machado, Mairon Melo; Machado, Magno Valério Trindade (2007) [Artigo de periódico]Results from a phenomenological analysis of W and Z hard diffractive hadroproduction at high energies are reported. Using the Regge factorization approach, we consider the recent diffractive parton density functions extracted ... -
Diffractive photoproduction of radially excited ψ(2S) mesons in photon-Pomeron reactions in PbPb collisions at energies available at the CERN Large Hadron Collider
Gay Ducati, Maria Beatriz; Griep, Mirian Thurow; Machado, Magno Valério Trindade (2013) [Artigo de periódico]In this work we investigate the photoproduction of radially excited vector mesons off nuclei in heavy ion relativistic collisions. In particular, we analyze the exclusive photoproduction of ψ(2S) off nuclei, evaluating the ... -
Diffractive quarkonium production in association with a photon at the LHC
Gay Ducati, Maria Beatriz; Machado, Mairon Melo; Machado, Magno Valério Trindade (2010) [Artigo de periódico]The rates for diffractive quarkonium plus prompt-photon associated production at the LHC are estimated. The theoretical framework considered in the J/Ψ (or Υ ) production associated with a direct photon at the hadron ... -
Dilepton production through timelike compton scattering within the kT-factorization approach
Peccini, Guilherme Müller; Moriggi, Lucas Soster; Machado, Magno Valério Trindade (2020) [Artigo de periódico]In this work we consider the dilepton production via timelike Compton scattering (TCS) in electronproton and proton-proton collisions. In particular, the differential cross section in terms of the dilepton invariant mass ... -
D-meson production in high energy pA collisions within the QCD color dipole transverse momentum representation
Santos, Glauber Sampaio dos; Machado, Magno Valério Trindade; Silveira, Gustavo Gil da (2022) [Artigo de periódico]The D-meson production is investigated by considering the unintegrated gluon distribution within the dipole approach in the momentum representation. We analyze the D-meson spectrum accounting for the effects of nonlinear ...