Navegação por Assunto "Cromodinâmica quântica"
Resultados 21-40 de 167
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Constraining the free parameter of the high parton density effects
(2000) [Artigo de periódico]The high parton density effects are strongly dependent of the spatial gluon distribution within the proton, with radius R, which cannot be derived from perturbative QCD. In this paper we assume that the unitarity corrections ... -
Correções relativísticas ao modelo de quarks no espalhamento J/ψ-nucleon
(2015) [Dissertação]O Método do Grupo Ressonante (RGM) é um método utilizado no estudo da interação hádron-hádron, na qual não são desprezados os graus de liberdade internos destas partículas. Nesta dissertação estudaremos os efeitos associados ... -
Coulomb corrections to inclusive cross sections at the future Electron-Ion Collider
(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 ... -
Decaimentos de mésons leves de sabor aberto no modelo C/sup 3/P/sub 0/
(2008) [Dissertação]A representação de Fock-Tani é um formalismo de teoria de campos para tratar problemas envolvendo simultaneamente partículas compostas e seus constituintes. O formalismo foi originalmente desenvolvido para tratar problemas ... -
Deciphering 40 TeV rapidity gap physics with 2 TeV jet events
(1992) [Artigo de periódico]Rapidity gaps may provide an adequate signature for electroweak processes at supercolliders, including the production of the Higgs particle. We show how this important issue can be studied in the dijet final states of ... -
Deeply virtual Compton scattering and saturation approach
(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
(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 small x shadowing corrections at DESY HERA
(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 ... -
Determination of the strong coupling constant αS(mZ) from measurements of inclusive W± and Z boson production cross sections in proton-proton collisions at √s = 7 and 8 TeV
(2020) [Artigo de periódico]Twelve measurements of inclusive cross sections of W± and Z boson production, performed in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, are compared with perturbative quantum chromodynamics calculations ... -
Dielectron and heavy-quark production in inelastic and high-multiplicity proton–proton collisions at √sNN = 13 TeV
(2019) [Artigo de periódico]The measurement of dielectron production is presented as a function of invariant mass and transverse momentum (pT) at midrapidity (|ye| <0.8) in proton–proton (pp) collisions at a centre-of-mass energy of √s=13TeV. The ... -
Diffractive Higgs boson photoproduction in ultraperipheral collisions at LHC
(2010) [Artigo de periódico]A new production mechanism for the standard model Higgs boson in ultraperipheral collisions at the LHC, which allows central exclusive diffractive production by double pomeron exchange in photonproton processes, is presented. ... -
Diffractive Higgs boson photoproduction in γp process
(2008) [Artigo de periódico]We explore an alternative process for diffractive Higgs boson production in peripheral pp collisions arising from double Pomeron exchange in photon-proton interaction. We introduce the impact factor formalism in order to ... -
Diffractive quarkonium production in association with a photon at the LHC
(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 distributions at backward rapidities
(2006) [Artigo de periódico]The dilepton production at backward rapidities in pAu and pp collisions at RHIC and LHC energies is investigated in the dipole approach. The results are shown through the nuclear modification ratio RpA considering transverse ... -
Dilepton pT suppression in the color glass condensate
(2005) [Artigo de periódico]Dilepton production is investigated in proton–nucleus collisions in the forward region using the color glass condensate approach. The transverse momentum distribution (pT), more precisely the ratio between proton–nucleus ... -
Dinâmica não-perturbativa de colisões hadrônicas
(2019) [Tese]Nos últimos anos, o LHC tem fornecido medições precisas de espalhamentos elásticos próton-próton que têm se tornado um guia importante na busca pela seleção de modelos fenomenológicos e abordagens teóricas para se entender, ... -
Dipole scattering amplitude in momentum space investigating fluctuations at HERA
(2008) [Trabalho completo publicado em evento] -
Direct observation of the dead-cone effect in quantum chromodynamics
(2022) [Artigo de periódico]In particle collider experiments, elementary particle interactions with large momentum transfer produce quarks and gluons (known as partons) whose evolution is governed by the strong force, as described by the theory of ... -
DIS and the effects of fluctuations : a momentum space analysis
(2008) [Artigo de periódico]Among the dipole models of deep inelastic scattering at small values of the Bjorken variable x, one has been recently proposed which relates the virtual photon– proton cross section to the dipole–proton forward scattering ... -
D-meson azimuthal anisotropy in midcentral Pb-Pb collisions at √sNN=5.02 TeV
(2018) [Artigo de periódico]The azimuthal anisotropy coefficient v2 of prompt D0 , Dþ , D*þ , and Dþs mesons was measured in midcentral (30%–50% centrality class) Pb-Pb collisions at a center-of-mass energy per nucleon pair √sNN¼ 5.02 TeV, with the ...
