139 citations · 327 across the 25 of their papers we have counts for
25 papers · 1 filter
Coherent photoproduction of light vector mesons off nuclear targets in the dipole picture
Cheryl Henkels, Emmanuel G. de Oliveira, Roman Pasechnik +1
We study the coherent photoproduction of light vector mesons in Pb-Pb collisions in the framework of color dipole approach. We employ the Glauber--Gribov formalism supplemented by…
Valence and sea parton correlations in double parton scattering from data
Edgar Huayra, Joao Vitor C. Lovato, Emmanuel G. de Oliveira
The effective cross section of double parton scattering in proton collisions has been measured by many experiments with rather different results. Motivated by this fact, we assumed…
Exclusive photo- and electroproduction of excited light vector mesons via holographic model
Cheryl Henkels, Emmanuel G. de Oliveira, Roman Pasechnik +1
In this paper, we study total and differential observables of electro- and photoproduction of light , and mesons as functions of the center-of-mass energy of the co…
DPS mechanism for associated production in UPCs as a probe for photon density inside the nucleus
Edgar Huayra, Emmanuel G. de Oliveira, Roman Pasechnik +1
We discuss the associated and pairs production in ultraperipheral heavy-ion collisions at high energies. Such a channel provides a novel probe for double-parton…
Momentum transfer squared dependence of exclusive quarkonia photoproduction in UPCs
Cheryl Henkels, Emmanuel G. de Oliveira, Roman Pasechnik +1
In this paper, we study fully differential quarkonia photoproduction observables in ultraperipheral collisions (UPCs) as functions of momentum transfer squared. We employ the dipol…
DPS mechanism for associated production in UPCs
Edgar Huayra, Emmanuel G. de Oliveira, Roman Pasechnik
We discuss the associated and quark pairs production in the double-parton scattering (DPS) process in ultraperipheral (UPCs) collisions. We derive an ana…
Open charm production and low x gluons
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We compare the rapidity, , and the beam energy, , behaviours of the cross section of the data for meson production in the forward direction that were measured by t…
Low x gluons determined by open charm production
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We use the LHCb data on the forward production of mesons at 7, 13 and 5 TeV to make a direct determination of the gluon distribution, , at NLO in the $10^{-5} \lesssim x \l…
LHC Forward Physics
K. Akiba, M. Akbiyik, M. Albrow +184
The goal of this report is to give a comprehensive overview of the rich field of forward physics, with a special attention to the topics that can be studied at the LHC. The report…
Scale dependence of open and production in the low region
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
The `optimal' factorization scale is calculated for open heavy quark production. We find that the optimal value is ; a choice which all…
BFKL equation for an integrated gluon density
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We show how it is possible to rewrite the BFKL equation for the unintegrated gluon distribution, in terms of integrated gluons, similar to that used in DGLAP. We add to our equatio…
Evolution in opening angle combining DGLAP and BFKL logarithms
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We present an evolution equation which simultaneously sums the leading BFKL and DGLAP logarithms for the integrated gluon distribution in terms of a single variable, namely the emi…
Physical factorisation scheme for PDFs for non-inclusive applications
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We introduce the physical factorisation scheme, which is necessary to describe observables which are `not completely inclusive'. We derive the formulae for NLO DGLAP evolution in t…
Unintegrated parton distributions in nuclei
E. G. de Oliveira, A. D. Martin, F. S. Navarra +1
We study how unintegrated parton distributions in nuclei can be calculated from the corresponding integrated partons using the EPS09 parametrization. The role of nuclear effects is…
Treatment of heavy quarks in QCD
E. G. de Oliveira, A. D. Martin, M. G. Ryskin +1
We show that to correctly describe the effects of the heavy-quark mass, m_h, in DGLAP evolution, it is necessary to work in the so-called `physical' scheme. In this way, we automat…
Heavy quarkonium production in a strong magnetic field
C. S. Machado, F. S. Navarra, E. G. de Oliveira +2
It is well known that in noncentral heavy-ion collisions a transient strong magnetic field is generated in the direction perpendicular to the reaction plane. The maximal strength o…
Treatment of the infrared contribution: NLO QED evolution as a pedagogic example
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We show that the conventional prescription used for DGLAP parton evolution at NLO has an inconsistent treatment of the contribution from the infrared (IR) region. We illustrate the…
Inclusive hadron and photon production at LHC in dipole momentum space
E. A. F. Basso, M. B. Gay Ducati, E. G. de Oliveira
Using a momentum space model for the dipole scattering amplitude we present an analysis of the saturation effects at LHC energies, describing the data on proton-proton and proton-l…
Improving the Drell-Yan probe of small x partons at the LHC via a k_t cut
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We show that the observation of the Drell-Yan production of low-mass lepton-pairs (M < 20 GeV) at high rapidities (Y > 3) at the LHC can make a direct measurement of parton distrib…
The LHC can probe small x PDFs; the treatment of the infrared region
A. D. Martin, E. G. de Oliveira, M. G. Ryskin
First, we show how to reduce the sensitivity of the NLO predictions of the Drell-Yan production of low-mass, lepton-pairs, at high rapidity, to the choice of factorization scale. I…
Nuclear shadowing in deep inelastic scattering on nuclei: a closer look
F. Carvalho, V. P. Goncalves, F. S. Navarra +1
The measurement of the nuclear structure function at the future electron-ion collider (EIC) will be of great relevance to understand the origin of the nuclear shado…
The treatment of the infrared region in perturbative QCD
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We discuss the contribution coming from the infrared region to NLO matrix elements and/or coefficient functions of hard QCD processes. Strictly speaking, this contribution is not k…
Drell-Yan as a probe of small x partons at the LHC
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
The predictions of Drell-Yan production of low-mass, lepton-pairs, at high rapidity at the LHC, are known to depend sensitively on the choice of factorization and renormalization s…
The small x gluon and b\bar{b} production at the LHC
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We study open b\bar{b} production at large rapidity at the LHC in an attempt to pin down the gluon distribution at very low x. For the LHC energy of 7 TeV, at next-to-leading order…