31,872 research outputs found
Investigating diffractive W production in hadron-hadron collisions at high energies
We compute the hard diffractive hadroproduction of bosons W at high energies
using Regge factorization and taking into account multiple Pomeron exchange
corrections. The ratio of diffractive to non-diffractive W production agrees
with the current Tevatron data and a prediction for the LHC is presented.Comment: 4 pages, 1 table. To appear in the proceedings of 10th International
Workshop on Hadron Physics (X Hadron Physics), Florianopolis, Brazil, 26-31
Mar 200
Neutrino structure functions in the QCD dipole picture
In this contribution we present an exploratory QCD analysis of the neutrino
structure functions in charged current DIS using the color dipole formalism.
The corresponding dipole cross sections are taken from recent phenomenological
and theoretical studies in deep inelastic inclusive production, including
nuclear shadowing corrections. The theoretical predictions are compared to the
available experimental results in the small-x region.Comment: 4 pages, 2 figures. To appear in the proceedings of the XXXVI
International Symposium on Multiparticle Dynamics. September 02-08, 2006
Paraty, Rio de Janeiro, Brazi
Inelastic quarkonium photoproduction in coherent hadron - hadron interactions at LHC energies
In this paper we study the inelastic quarkonium photoproduction in coherent
interactions. Considering the ultra relativistic hadrons as a
source of photons, we estimate the total ( and ) cross sections and rapidity distributions at
LHC energies. Our results demonstrate that the experimental analysis of this
process can be used to understand the underlying mechanism governing heavy
quarkonium production.Comment: 9 pages, 7 figures, 3 table
Charm and bottom production in inclusive double Pomeron exchange in heavy ion collisions at the LHC
The inclusive double Pomeron exchange cross section for heavy quark pair
production is calculated for nucleus-nucleus collisions at the LHC. The present
estimate is based on hard diffractive factorization, corrected by absorptive
corrections and nuclear effects. The theoretical uncertainties for nuclear
collisions are investigated and a comparison to other approaches is presented.
The production channels producing a similar final state configuration are
discussed as well.Comment: 7 pages, 3 tables. Final version to be published in Physical Review
Investigating the exclusive protoproduction of dileptons at high energies
Using the high energy color dipole approach, we study the exclusive
photoproduction of lepton pairs. We use simple models for the elementary
dipole-hadron scattering amplitude that captures main features of the
dependence on atomic number A, on energy and on momentum transfer t. This
investigation is complementary to conventional partonic description of timelike
Compton scattering, which considers quark handbag diagrams at leading order in
and simple models of the relevant generalized parton distributions
(GPDs). These calculations are input in electromagnetic interactions in pp and
AA collisions to measured at the LHC.Comment: 6 pages, 4 figure
Exclusive photoproduction of J/psi and psi(2S) states in pp and AA collisions at the LHC
In this contribution we report on the investigations of the exclusive
production of J/psi and psi(2S) states in proton-proton and nucleus-nucleus
reactions at the LHC using the theoretical framework of light-cone dipole
formalism.Comment: Presented at EDS Blois 2013 (arXiv:1309.5705
Exclusive photoproduction of dileptons at high energies
The exclusive photoproduction of lepton pairs on nucleon and nucleus target
is investigated within the high energy color dipole approach, where the main
physical quantity is the dipole-target elastic scattering amplitude that
captures the main features of the dependence on atomic number A, on energy and
on momentum transfer t. These calculations are input in predictions for
electromagnetic interactions in pp and AA collisions to be measured at the LHC.Comment: 5 pages, 1 figure and 1 table. Contribution to the proceedings of
XXXVIII International Symposium on Multiparticle Dynamics (ISMD2008).
Hamburg, Germany, 15-20 September 200
Photon plus heavy quark production in high energy collisions within the target rest frame formalism
We apply the target rest frame formalism to photon + heavy quark production
cross section in hadronic collisions at high energies. We investigate the
dependence of the production cross section on the photon and quark rapidities
and transverse momenta. It is shown that the photon transverse momentum
spectrum is a sensitive probe of color dipole scattering amplitude. The
theoretical results are compared to Tevatron measurements of the differential
\gamma + c + X and \gamma + b + X production cross sections at 1.96 TeV. An
analysis for proton-proton and proton-lead collisions at the LHC regime is also
performed.Comment: 6 pages, 3 figures. Version to be published in Physical Review
- …