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Related papers: Diffractive photoproduction of Z^0 bosons in coher…

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In this work the $k_{\perp}$-factorization formalism is applied to compute the exclusive $Z^0$ boson photoproduction in $ep$ and $eA$ collisions. The study is also extended to $pp$ and $AA$ processes. The nuclear effects are investigated…

High Energy Physics - Phenomenology · Physics 2022-07-20 G. M. Peccini , L. S. Moriggi , M. V. T. Machado

Protons and antiprotons at collider energies are a source of high energy Weizsaecker--Williams photons. This opens up a possibility to study at the LHC exclusive photoproduction of heavy vector mesons at energies much larger than possible…

High Energy Physics - Phenomenology · Physics 2014-11-20 A. Cisek , W. Schäfer , A. Szczurek

In this work we analyse the theoretical uncertainties on the predictions for the photoproduction of light vector mesons in coherent pp, pA and AA collisions at the LHC energies using the color dipole approach. In particular, we present our…

High Energy Physics - Phenomenology · Physics 2015-03-05 G. Sampaio dos Santos , M. V. T. Machado

We provide predictions for the rapidity distributions of exclusive photoproduced J/psi and Upsilon mesons, and Z^0 bosons, at the Tevatron and LHC. We use the equivalent-photon approximation with the photon-proton cross sections given by…

High Energy Physics - Phenomenology · Physics 2008-11-26 L. Motyka , G. Watt

In this letter we study the diffractive photoproduction of heavy quarks in hadronic (pp/pA/AA) interactions for Tevatron and LHC energies. The integrated cross section and rapidity distribution for the process h_1 h_2 --> h_1 h_2 QQBAR (h_i…

High Energy Physics - Phenomenology · Physics 2008-11-26 V. P. Goncalves , M. V. T. Machado

Collisions with Oxygen ions at the LHC opens the possibility of investigating the description of the QCD dynamics in an unexplored regime, complementary to those performed in $pp$, $pPb$ and $PbPb$ collisions. In this paper we estimate the…

High Energy Physics - Phenomenology · Physics 2023-06-07 Victor P. Goncalves , Bruno D. Moreira , Luana Santana

An analysis of prompt photon production in high energy nuclear collisions at the LHC energy regime is performed within the parton saturation picture taking into account the updated phenomenological color dipole models. The results are…

High Energy Physics - Phenomenology · Physics 2020-12-14 G. Sampaio dos Santos , G. Gil da Silveira , M. V. T. Machado

Recent results on the Deeply Virtual Compton Scattering (DVCS) and prompt photon productions from H1 and ZEUS experiments on the $ep$ collider HERA are presented. A new DVCS cross section measurements of the H1 Collaboration, for photon…

High Energy Physics - Experiment · Physics 2007-05-23 L. Favart

The exclusive $\Upsilon$ photoproduction in proton-proton and proton - nucleus collisions at LHC energies is investigated using the color dipole formalism and considering different models for the $\Upsilon$ wave function and forward dipole…

High Energy Physics - Phenomenology · Physics 2015-06-22 V. P. Goncalves , B. D. Moreira , F. S. Navarra

Exclusive vector meson photoproduction associated with a leading baryon ($B = n, \Delta^+, \Delta^0$) in $pp$ and $pA$ collisions at RHIC and LHC energies is investigated using the color dipole formalism and taking into account nonlinear…

High Energy Physics - Phenomenology · Physics 2018-04-11 F. Carvalho , V. P. Goncalves , F. S. Navarra , D. Spiering

In this paper we present a comprehensive analysis of the exclusive heavy quark photoproduction in $pp$, $pPb$ and $PbPb$ collisions at LHC and FCC energies using the color dipole formalism and taking into account of nonlinear corrections to…

High Energy Physics - Phenomenology · Physics 2020-05-20 V. P. Goncalves , G. Sampaio dos Santos , C. R. Sena

We calculate the inclusive and diffractive photoproduction of heavy quarks in proton-proton collisions at Tevatron and LHC energies, where the photon reaches energies larger than those ones accessible at DESY-HERA. The integrated cross…

High Energy Physics - Phenomenology · Physics 2009-09-02 V. P. Goncalves , M. V. T. Machado , A. R. Meneses

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…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. V. T. Machado

In this paper we extend the color dipole formalism to the study of exclusive processes associated with a leading neutron in $ep$ collisions at high energies. The exclusive $\rho$, $\phi$ and $J/\Psi$ production, as well as the Deeply…

High Energy Physics - Phenomenology · Physics 2016-04-13 V. P. Goncalves , F. S. Navarra , D. Spiering

In this paper we present a comprehensive analysis of exclusive vector meson photoproduction in $pp$, $pPb$ and $PbPb$ collisions at Run 2 LHC energies using the Color Dipole formalism. The rapidity distributions and total cross sections for…

High Energy Physics - Phenomenology · Physics 2017-12-06 V. P. Goncalves , M. V. T. Machado , B. D. Moreira , F. S. Navarra , G. Sampaio dos Santos

We extend the k_\perp-factorization formalism for exclusive photoproduction of vector mesons to the production of electroweak Z^0 bosons. Predictions for the gamma p \to Z^0 p and p p \to p p Z^0 reactions are given using an unintegrated…

High Energy Physics - Phenomenology · Physics 2009-10-29 A. Cisek , W. Schäfer , A. Szczurek

The inclusive photoproduction of heavy mesons in ultraperipheral $pPb$ and $PbPb$ collisions at the LHC energies is investigated considering the color dipole $S$-matrix formalism and assuming distinct models for the unintegrated gluon…

High Energy Physics - Phenomenology · Physics 2026-03-19 Victor P. Goncalves , Luana Santana , Wolfgang Schäfer

In this letter we update our predictions for exclusive $J/\Psi$ and $\Upsilon$ photoproduction in proton-proton and nucleus - nucleus collisions at the Run 2 LHC energies obtained with the color dipole formalism and considering the impact…

High Energy Physics - Phenomenology · Physics 2017-03-22 V. P. Goncalves , B. D. Moreira , F. S. Navarra

The diffractive vector meson photoproduction with hadron dissociation in coherent hadron-hadron interactions at LHC energies is studied assuming that the color singlet $t$-channel exchange carries large momentum transfer. We estimate the…

High Energy Physics - Phenomenology · Physics 2015-05-18 V. P. Goncalves , W. K. Sauter

Photon-proton ($\gamma p$) interactions with~$Q^2<10^{-2}$~GeV$^2$ and deep-inelastic scattering ($\gamma^* p$) interactions with photon virtualities $Q^2>5$~GeV$^2$ are studied at the high energy electron-proton collider HERA. The…

High Energy Physics - Experiment · Physics 2008-11-26 H1-Collaboration
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