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Inclusive $K^0$ and $\Lambda$ photoproduction has been investigated at HERA with the H1 detector at an average photon-proton center of mass energy of 200 GeV in the transverse momentum range 0.5 <p_t <5 GeV. The production rates as a…

High Energy Physics - Experiment · Physics 2008-11-26 C. Adloff

The exclusive $\rho$, $\omega$ and $J/\Psi$ photoproduction in fixed - target collisions at the LHC is investigated. We estimate, for the first time, the rapidity and transverse momentum distributions of the vector meson photoproduction in…

High Energy Physics - Phenomenology · Physics 2018-09-26 V. P. Goncalves , M. M. Jaime

Exclusive vector meson photoproduction, $pp\to ppV$ and $\bar pp\to\bar ppV$ occurs with significant rates at hadron colliders. The reaction can be used to study the gluon distribution of protons. Vector mesons may be produced with either…

High Energy Physics - Phenomenology · Physics 2007-05-23 Spencer Klein , Joakim Nystrand

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 emphasize the complementarity of timelike and spacelike studies of deep exclusive processes, taking as an example the case of timelike Compton Scattering (TCS) i.e. the exclusive photoproduction of a lepton pair with large invariant…

High Energy Physics - Phenomenology · Physics 2015-05-28 B. Pire , L. Szymanowski , J. Wagner

The photoproduction of isolated photons has been measured in diffractive events recorded by the ZEUS detector at HERA. Cross sections are evaluated in the photon transverse-energy and pseudorapidity ranges $5 < E_T < 15$ GeV and $-0.7 <…

High Energy Physics - Experiment · Physics 2017-07-20 ZEUS Collaboration

The exclusive photoproduction of upsilon states $\Upsilon(1S)$ and its radially excited states $\Upsilon(2S,3S)$ is investigated in the context of ultra-peripheral collisions at the LHC energies. Predictions are presented for their…

High Energy Physics - Phenomenology · Physics 2016-11-23 M. B. Gay Ducati , F. Kopp , M. V. T. Machado , S. Martins

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

A first measurement is presented of exclusive photoproduction of $\rho^0$ mesons associated with leading neutrons at HERA. The data were taken with the H1 detector in the years $2006$ and $2007$ at a centre-of-mass energy of $\sqrt{s}=319$…

High Energy Physics - Experiment · Physics 2016-04-11 H1 Collaboration

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…

High Energy Physics - Phenomenology · Physics 2008-11-17 M. V. T. Machado

In this paper, after a brief summary of the properties of the Off-Forward Parton Distributions, we give some examples of what could be the experimental opportunities to access them at the current high-energy lepton facilities : JLab (E_e >=…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. Guidal , M. Vanderhaeghen

Based on the color-dipole picture, we present a successful parameter-free prediction for the recent high-energy $J/\psi$ photoproduction data from the Large Hadron Collider. The experimental data provide empirical evidence for the…

High Energy Physics - Phenomenology · Physics 2017-04-05 Dieter Schildknecht

The exclusive photoproduction of the heavy vector mesons $\psi$'s and $Y$'s is investigated in peripheral lead-lead collisions for the energies available at the LHC, $\sqrt{s}=2.76$ TeV and $\sqrt{s}=5.02$ TeV. In order to evaluate the…

High Energy Physics - Phenomenology · Physics 2018-06-27 M. B. Gay Ducati , S. Martins

We discuss the photoproduction of $\Upsilon$ and $J/\psi$ at high energy $\bar{p}p$, $pp$ and heavy ion colliders. We predict large rates in $\bar{p}p$ interactions at the Fermilab Tevatron %and in heavy-ion interactions at the CERN LHC.…

High Energy Physics - Phenomenology · Physics 2009-11-10 Spencer R. Klein , Joakim Nystrand

We present a detailed comparison of a variety of predictions for diffractive light vector meson production with the data collected at the HERA collider. All our calculations are performed within a dipole model framework and make use of…

High Energy Physics - Phenomenology · Physics 2008-11-26 J. R. Forshaw , R. Sandapen , G. Shaw

We discuss coherent and incoherent photoproduction of $J/\Psi$ vector mesons in high energy heavy ion collisions. In a dipole picture for the photon both can be naturally related to the dipole cross section that is also probed in inclusive…

High Energy Physics - Phenomenology · Physics 2013-10-25 T. Lappi , H. Mäntysaari

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

A first measurement is presented of exclusive photoproduction of $\rho^0$ mesons associated with leading neutrons at HERA. The data were taken with the H1 detector in the years $2006$ and $2007$ at a centre-of-mass energy of $\sqrt{s}=319$…

High Energy Physics - Experiment · Physics 2017-10-31 Jan Olsson

The proton-dissociative diffractive photoproduction of J/psi mesons has been studied in ep collisions with the ZEUS detector at HERA using an integrated luminosity of 112 pb^-1. The cross section is presented as a function of the…

High Energy Physics - Experiment · Physics 2015-03-13 ZEUS Collaboration

The diffractive heavy quark cross sections are estimated considering photon-Pomeron ($\gamma \pom$) interactions in hadron - hadron at RHIC, Tevatron, and CERN LHC energies. We assume the validity of the hard diffractive factorization and…

High Energy Physics - Phenomenology · Physics 2015-06-03 V. P. Goncalves , M. M. Machado