Navegação Ciências Exatas e da Terra por Autor "Machado, Magno Valério Trindade"
Resultados 21-40 de 80
-
Double meson production in ultraperipherical heavy-ion collisions
(2003) [Artigo de periódico]The double-meson production in ultraperipheral heavy-ions collisions is addressed, focusing on the particular case of ρJ/Ψ from two-photon reactions. The cross section at photon level is obtained using distinct parameterizations ... -
Double-photon exclusive processes with heavy-quark–heavy-antiquark pairs in high-energy Pb-Pb collisions at energies available at the CERN Large Hadron Collider
(2011) [Artigo de periódico]The cross section for exclusive heavy-quark and heavy-antiquark pair (Q¯Q) production in peripheral ultrarelativistic heavy-ion collisions is calculated at an energy available at the CERN Large Hadron Collider, i.e., √ sNN ... -
Estimate of the single diffractive heavy quark production in heavy ion collisions at the CERN LHC
(2010) [Artigo de periódico]The single diffractive cross section for heavy quarks production is calculated at next-to-leading order (for nucleus-nucleus collisions. Such processes are expected to occur at the LHC, where the nuclei involved are lead ... -
Exclusive dilepton production via timelike Compton scattering in heavy ion collisions
(2021) [Artigo de periódico]In the present work, kT -factorization formalism is applied to compute the exclusive dilepton production by timelike Compton scattering (TCS) in eA, pA, and AA collisions. The nuclear effects are investigated considering ... -
Exclusive glueball production in high-energy nucleus-nucleus collisions
(2011) [Artigo de periódico]The cross sections for the glueball candidates in quasireal photon-photon collisions and on central diffraction processes (i.e., double Pomeron exchange) in heavy-ion interactions at the Relativistic Heavy-Ion Collider ... -
Exclusive photoproduction of J/ψ and ψ(2S) states in proton-proton collisions at the CERN LHC
(2013) [Artigo de periódico]In this work we investigate the exclusive photoproduction of J=c and the radially excited c ð2SÞ state off nucleons in proton-proton collisions. The theoretical framework considered in the analysis is the light-cone dipole ... -
Exclusive photoproduction of light vector meson in coherent collisions at the LHC energies
(2016) [Artigo de periódico]In this work we present our predictions for the rapidity distribution for 0 and photoproduction in coherent pp and AA collisions at the LHC energies using the color dipole approach. In particular, we perform an analysis ... -
Exclusive photoproduction of quarkonium in proton-nucleus collisions at energies available at the CERN Large Hadron Collider
(2014) [Artigo de periódico]In this work we investigate the coherent photoproduction of ψ(1S), ψ(2S), and ϒ states in the proton-nucleus collisions in the CERN Large Hadron Collider (LHC) energies. Predictions for the rapidity distributions are ... -
Exclusive Z0 production in ep and eA collisions at high energies
(2022) [Artigo de periódico]In this work the k⊥-factorization formalism is applied to compute the exclusive Z0 boson photoproduction in ep and eA collisions. The study is also extended to pp and AA processes. The nuclear effects are investigated ... -
Foreword
(2008) [Texto de apresentação/encerramento] -
Geometric scaling in inclusive charm production
(2003) [Artigo de periódico]We show that the cross section for inclusive charm production exhibits geometric scaling in a large range of photon virtualities. In the DESY ep collider HERA kinematic domain the saturation momentum Q2 sat x stays below ... -
Hard and soft contributions in diffraction : a closed look
(2001) [Artigo de periódico]Disentangle the hard and soft dynamics in diffractive DIS is one of the main open questions of the strong interactions. We propose the study of the logarithmic slope in Q2 of the diffractive structure function as a potential ... -
Hard gluon evolution in warming medium
(2022) [Artigo de periódico]We describe the energy distribution of hard gluons travelling through a dense quark–gluon plasma whose temperature increases linearly with time, within a probabilis tic perturbative approach. The results were applied to ... -
Heavy quark photoproduction in proton-proton collisions
(2005) [Artigo de periódico]We calculate the photoproduction of heavy quarks in proton-proton collisions at RHIC, Tevatron, and CERN LHC energies, where the photon reaches energies larger than those accessible at DESY-HERA. The integrated cross section ... -
Heavy quark photoproduction in the k/sub [momento transverso]/-factorization approach
(2002) [Artigo de periódico]We investigate heavy quark photoproduction based on the k'-factorization approach, focusing on the results from the saturation model. The deviations between the results using the unintegrated gluon distribution considering ... -
Inclusive and exclusive dilepton photoproduction at high energies
(2013) [Artigo de periódico]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 ... -
Investigating entanglement entropy at small x in DIS off protons and nuclei
(2020) [Artigo de periódico]In this work we analyze the entanglement entropy in deep inelastic scattering off protons and nuclei. It is computed based on the formalism where the partonic state at small-x is maximally entangled with proton being ... -
Investigating Fl (x, Q2) at fixed energy in the color dipole formalism
(2006) [Artigo de periódico]At small x, the structure function FL(x,Q2) is driven by the gluon content of the nucleon target and consequently it can unravel the underlying QCD dynamics in that region. In this work, one studies its behavior on the ... -
Investigating photoproduction of scalar mesons at medium energies
(2012) [Artigo de periódico]In this paper we study the photoproduction of scalar mesons in the intermediate energies, considering distinct mixing scenarios in the description of meson physical states. The differential and integrated total cross ... -
Investigating the central diffractive f0(980) and f0(1270) meson production at the LHC
(2012) [Artigo de periódico]The central diffractive production of mesons f0ð980Þ and f2ð1270Þ at the energy of CERN-Large Hadron Collider experiment on proton-proton collisions is investigated. The processes initiated by quasireal photon-photon ...
