Navegação por Assunto "Pomerons"
Resultados 1-20 de 26
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Aspects of the unitarized soft multipomeron approach in DIS and diffraction
(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 ... -
Charm and bottom production in inclusive double Pomeron exchange in heavy-ion collisions at energies available at the CERN Large Hadron Collider
(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, ... -
Color evaporation and elastic [ípsilon] photoproduction at DESY HERA
(2002) [Artigo de periódico]The diffractive photoproduction of vector mesons is usually described by considering the two-gluon (Pomeron) exchange, the nondiagonal parton distributions, and the contribution of the real part to the cross section. In ... -
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 ... -
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 photoproduction of radially excited ψ(2S) mesons in photon-Pomeron reactions in PbPb collisions at energies available at the CERN Large Hadron Collider
(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 ... -
Difração em colisões hadrônicas altamente energéticas
(2011) [Tese]Apresento as investigações realizadas durante estes quatro anos de doutorado no Grupo de Fenomenologia de Partículas de Altas Energias (GFPAE). Foi desenvolvido um estudo teórico/fenomenológico baseado em QCD perturbativa ... -
Double diffractive meson production and the BFKL pomeron at e/sup +/ e/sup -/ colliders
(2006) [Artigo de periódico]In this paper we study the double diffractive vector meson production in e+ e- collisions assuming the dominance of the BFKL pomeron exchange. We consider the nonforward solution of the BFKL equation at high energy and ... -
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 vector meson production from the BFKL equation
(2005) [Artigo de periódico]The double vector meson production in two-photon collisions is addressed assuming that the color singlet t-channel exchange carries large momentum transfer. We consider the non-forward solution of the BFKL equation at high ... -
Espalhamento próton-próton em altas energias e os propagadores não-perturbativos do glúon
(2023) [Dissertação]Investigamos o modelo do Pomeron como troca de dois glúons com propagadores não-perturbativos, caracterizados por uma escala de massa dinâmica. Utilizamos esse modelo de Pomeron na análise de dados de seção de choque ... -
Estimations for the Higgs boson production with QCD and EW corrections in exclusive events at the LHC
(2011) [Artigo de periódico]The Higgs boson production is investigated in proton-proton collisions at next-to-leading-order accuracy in central exclusive diffractive processes at the LHC. The production process by the double Pomeron exchange is ... -
Estimations for the single diffractive production of the Higgs boson at the Tevatron and the LHC
(2011) [Artigo de periódico]The single diffractive production of the standard model Higgs boson is computed using the diffractive factorization formalism, taking into account a parametrization for the Pomeron structure function provided by the H1 ... -
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 ... -
Fenomenologia em cromodinâmica quântica com propagador de glúon modificado
(2003) [Tese]A aplicabilidade e usos de propagadores de glúon modificados na Cromodinâmica Quântica (QCD) em diferentes espécies de processos é analisada. Os propagadores modificados de glúon são obtidos por diversos métodos, em especial, ... -
Física de Pomeron a altas energias
(2002) [Tese]Neste trabalho investigamos a física de Pomeron, tanto em sua formulação perturbativa dada pela Cromodinâmica Quântica como o aspecto não-perturbativo dado pela teoria de Regge. Estes formalismos teóricos levam em consideração ... -
Forward elastic scattering and Pomeron models
(2018) [Artigo de periódico]Recent data from LHC13 by the TOTEM Collaboration indicate an unexpected decrease in the value of the ρ parameter and a σtot value in agreement with the trend of previous measurements at 7 and 8 TeV. These data at 13 TeV ... -
Fotoprodução difrativa de Higgs por duplo Pomeron
(2007) [Dissertação]Propomos um processo alternativo para a produção difrativa do bóson de Higgs inspirado no Modelo KMR. Neste modelo, exploramos a produção do bóson de Higgs através da interação γ*p em alta energia importando do Modelo KMR ... -
Um modelo partônico para a difração aplicado ao DIS
(1998) [Dissertação]A observação de uma nova classe de eventos no espalhamento profundamente inelástico (D18) elétron-próton tem gerado grande interesse teórico e experimental. Estes eventos apresentam grandes intervalos na variável pseudo-rapidez ... -
Nuclear exclusive vector meson photoproduction
(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 ...
