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The Phillips–Barger model for the elastic cross section and the Odderon

Inspired by the recent TOTEM data for the elastic proton–proton (pp) scattering at \(\sqrt{s} =\) 8 and 13 TeV, we update previous studies of the differential cross sections using the Phillips–Barger (PB) model, which parametrizes the amplitude in terms of a small number of free parameters. We demonstrate that this model is able to describe the recent pp data on a statistically...

Exclusive vector meson photoproduction in fixed-target collisions at the LHC

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 pHe, pAr, PbHe and PbAr fixed-target collisions at the LHC using the STARlight Monte Carlo and present our results for the total cross...

Phenomenological implications of the intrinsic charm in the Z boson production at the LHC

In this paper we study the Z, \(Z+\) jet, \(Z+c\), and \(Z+c+\) jet production in pp collisions at the LHC considering different models for the intrinsic charm content of the proton. We analyze the impact of the intrinsic charm in the rapidity and transverse momentum distributions for these different processes. Our results indicated that differently from the other processes, the...

Double vector meson production in photon–hadron interactions at hadronic colliders

In this paper we analyze the double vector meson production in photon–hadron (\(\gamma h\)) interactions at pp / pA / AA collisions and present predictions for the \(\rho \rho \), \(J/\Psi J/\Psi \), and \(\rho J/\Psi \) production considering the double scattering mechanism. We estimate the total cross sections and rapidity distributions at LHC energies and compare our results...

Double vector meson production in \(\gamma \gamma \) interactions at hadronic colliders

In this paper we revisit the double vector meson production in \(\gamma \gamma \) interactions at heavy ion collisions and present, by the first time, predictions for the \(\rho \rho \) and \(J/\Psi J/\Psi \) production in proton–nucleus and proton–proton collisions. In order to obtain realistic predictions for rapidity distributions and total cross sections for the double vector...

Probing the gluon density of the proton in the exclusive photoproduction of vector mesons at the LHC: a phenomenological analysis

The current uncertainty on the gluon density extracted from the global parton analysis is large in the kinematical range of small values of the Bjorken-x variable and low values of the hard scale \(Q^2\). An alternative to reduces this uncertainty is the analysis of the exclusive vector meson photoproduction in photon–hadron and hadron–hadron collisions. This process offers a...

Double vector meson production in the International Linear Collider

In this paper we study double vector meson production in \(\gamma \gamma \) interactions at high energies and estimate, using the color dipole picture, the main observables which can be probed at the International Linear Collider (ILC). The total \(\gamma (Q_1^2) + \gamma (Q_2^2) \rightarrow V_1 + V_2\) cross sections for \(V_i = \rho \), \(\phi \), \(J/\psi \), and \(\varUpsilon...

Photon-hadron interactions in pA/AA collisions and the QCD dynamics

In this contribution we study the photoproduction of heavy quarks in coherent proton-nucleus (pA) and nucleus-nucleus (AA) interactions for RHIC and LHC energies and analyze if this process can be used to determine the QCD dynamics at high energies. The integrated cross section and rapidity distribution are estimated. Our results indicate that the nonlinear dynamics can be proven...

QCD at high parton density

. Kharlov, Phys. Rept. 364, 359 (2002).         [ Links ] [42] V. P. Gonçalves and C. A. Bertulani, Phys. Rev. C 65, 054905 (2002).         [ Links ] [43] V. P. Gonçalves and M. V. Machado, Eur. Phys. J. C ... 31, 371 (2003).         [ Links ] [44] C. A. Bertulani and G. Baur, Phys. Rept. 163, 299 (1988).         [ Links ] [45] V. P. Gonçalves and M. V. Machado, Eur. Phys. J. C 28, 71 (2003

Saturation and the Ratio sigmadiff/sigmatot in an electron-ion collider

. P. Gonçalves, and F. S. Navarra, Eur. Phys. J. C 46, 465 (2006).         [ Links ] [8] M. S. Kugeratski, V. P. Gonçalves, and F. S. Navarra, Eur. Phys. J. C 46, 413 (2006).         [ Links ... . D 62, 019901 (2000).         [ Links ] [12] E. Levin and M. Lublinsky, Nucl. Phys. A 712, 95 (2002).         [ Links ] [13] V. P. Gonçalves and M. V. T. Machado, Eur. Phys. J. C 30, 387 (2003

Saturation and the Ratio sigmadiff/sigmatot in an electron-ion collider

. P. Gonçalves, and F. S. Navarra, Eur. Phys. J. C 46, 465 (2006).         [ Links ] [8] M. S. Kugeratski, V. P. Gonçalves, and F. S. Navarra, Eur. Phys. J. C 46, 413 (2006).         [ Links ... . D 62, 019901 (2000).         [ Links ] [12] E. Levin and M. Lublinsky, Nucl. Phys. A 712, 95 (2002).         [ Links ] [13] V. P. Gonçalves and M. V. T. Machado, Eur. Phys. J. C 30, 387 (2003

Saturation and the Ratio sigmadiff/sigmatot in an electron-ion collider

. P. Gonçalves, and F. S. Navarra, Eur. Phys. J. C 46, 465 (2006).         [ Links ] [8] M. S. Kugeratski, V. P. Gonçalves, and F. S. Navarra, Eur. Phys. J. C 46, 413 (2006).         [ Links ... . D 62, 019901 (2000).         [ Links ] [12] E. Levin and M. Lublinsky, Nucl. Phys. A 712, 95 (2002).         [ Links ] [13] V. P. Gonçalves and M. V. T. Machado, Eur. Phys. J. C 30, 387 (2003

Saturation and the Ratio sigmadiff/sigmatot in an electron-ion collider

. P. Gonçalves, and F. S. Navarra, Eur. Phys. J. C 46, 465 (2006).         [ Links ] [8] M. S. Kugeratski, V. P. Gonçalves, and F. S. Navarra, Eur. Phys. J. C 46, 413 (2006).         [ Links ... . D 62, 019901 (2000).         [ Links ] [12] E. Levin and M. Lublinsky, Nucl. Phys. A 712, 95 (2002).         [ Links ] [13] V. P. Gonçalves and M. V. T. Machado, Eur. Phys. J. C 30, 387 (2003

Nuclear dependence of the saturation scale and its consequences for the electron-ion collider

-Biernat, and J. Kwieci\'nski, Phys. Rev. Lett. 86, 596 (2001).         [ Links ] [6] V. P. Gonçalves and M. V. T. Machado, Phys. Rev. Lett. 91, 202002 (2003).         [ Links ] [7] I. Arsene et al ... ).         [ Links ] [11] V. P. Gonçalves, M. S. Kugeratski, M. V .T. Machado, and F. S. Navarra, Phys. Lett. B 643, 273 (2006).         [ Links ] [12] J. R. Forshaw, G. Kerley, and G. Shaw, ''Extracting the

Nuclear effects in HERA-B

In this contribution we estimate the influence of the shadowing effect and initial state parton energy loss in the quarkonium production at HERA-B. We analyze the xF behavior of the effective exponent a(xF) and present a comparison with the preliminary HERA-B data for J/Y production. Moreover, we present our predictions for ¡ production at HERA-B. The magnitude of these effects...

Elastic energy loss in an expanding QGP

. Thoma, Acta Phys. Hung. A 22, 93 (2005) [arXiv:hep-ph/0311168].         [ Links ] [2] M. G. Mustafa, Phys. Rev. C 72, 014905 (2005).         [ Links ] [3] M. B. Gay Ducati, V. P. Gonçalves, L. F

Gluon saturation and leading particle spectra in pp collisions

In this work we use the IGM, a model that describes well the energy flux in hadronic collisions, to study the leading particle spectrum when saturation effects on the gluon distribution function are included. The leading particle spectrum is calculated for several center of mass energies (Ös). In the very high energy limit we compare our results with the predictions made in a...