Quarkonium production in coherent hadron-hadron interactions at the CERN LHC

Gonçalves, V. P.; Machado, M. V. T.

doi:10.1103/physrevd.77.014037

Cited by 48 publications

(57 citation statements)

References 53 publications

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“…For related works in coherent interactions see Ref. [23]. Considering the requirement that photoproduction is not accompanied by hadronic interaction (ultraperipheral collision) an analytic approximation for the equivalent photon flux of a nuclei can be calculated, which is given by [5] …”

Section: Photoproduction Of Z 0 In Coherent Collisionsmentioning

confidence: 99%

Diffractive photoproduction of Z0 bosons in coherent interactions at CERN-LHC

Gonçalves

Machado

2008

Eur. Phys. J. C

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The exclusive Z 0 photoproduction at high energies in γp(A), pp and AA collisions is investigate within the color dipole formalism. We generalize the description of the deeply virtual compton scattering (DVCS) process, which describe quite well the HERA data, for the production of Z 0 bosons and estimate the total cross section for the exclusive process γ * h → Z 0 h (h = p, A) for different energies, photon virtualities and atomic numbers. As hadrons at collider energies are a source of Weizsäcker -Williams photons, we consider electromagnetic interactions in hadron-hadron collisions at Tevatron and LHC energies and estimate the rapidity distribution and total cross section for Z 0 production in the h h → h Z 0 h process. This is the first estimation for such a process in literature. It can allow us to study, for instance, the physics of hadronic Z 0 decays in a clean environment characterized by two rapidity gaps. Our results indicate that the experimental analyzes of this process could be feasible in pp but the physics scenario for AA collisions is not promising.

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Section: Photoproduction Of Z 0 In Coherent Collisionsmentioning

confidence: 99%

Diffractive photoproduction of Z0 bosons in coherent interactions at CERN-LHC

Gonçalves

Machado

2008

Eur. Phys. J. C

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“…and this prescription has been used in many subsequent works [25][26][27][28][29]. It is motivated by the explicit perturbative analysis in [22] that such a phase factor arises in nonforward amplitudes ∆ ⊥ = 0.…”

Section: The Dipole S-matrix and The Gluon Gpdmentioning

confidence: 99%

Gluon tomography from deeply virtual Compton scattering at small x

2017

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We present a full evaluation of the deeply virtual Compton scattering (DVCS) cross section in the dipole framework in the small-x region. The result features the cos φ and cos 2φ azimuthal angular correlations which have been missing in previous studies based on the dipole model. In particular, the cos 2φ term is generated by the elliptic gluon Wigner distribution whose measurement at the planned electron-ion collider (EIC) provides an important information about the gluon tomography at small-x. We also show the consistency with the standard collinear factorization approach based on the quark and gluon generalized parton distributions (GPDs).

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“…In contrast, for the double J/ production, the contribution associated to the description of the QCD dynamics at high energies contributes significantly, mainly in pp collisions. Predictions for the RHIC, LHC, FCC, and CEPC-SPPC energies are shown.In recent years a series of experimental results from RHIC [1,2], Tevatron [3] and LHC [4][5][6][7][8][9][10][11][12] demonstrated that the study of photon-induced interactions in hadronic colliders is feasible and that it can be used to, among other things, improve our knowledge on the nuclear gluon distribution [13][14][15][16][17][18][19], on details of QCD dynamics [20][21][22][23][24][25][26][27][28][29][30], on the mechanism of quarkonium production [29][30][31][32][33][34][35][36], on the Odderon [37,38] and on the photon flux of the proton [39,40]. These data have stimulated the development of the theoretical description of these processes as well as the proposal of new forward detectors to be installed in the LHC [41,42].…”

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confidence: 99%

Double vector meson production in $$\gamma \gamma $$ γ γ interactions at hadronic colliders

2016

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In this paper we revisit the double vector meson production in γ γ interactions at heavy ion collisions and present, by the first time, predictions for the ρρ and J/ J/ 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 production in ultra peripheral hadronic collisions we take into account the description of γ γ → V V cross section at low energies as well as its behavior at large energies, associated to the gluonic interaction between the color dipoles. Our results demonstrate that the double ρ production is dominated by the low energy behavior of the γ γ → V V cross section. In contrast, for the double J/ production, the contribution associated to the description of the QCD dynamics at high energies contributes significantly, mainly in pp collisions. Predictions for the RHIC, LHC, FCC, and CEPC-SPPC energies are shown.In recent years a series of experimental results from RHIC [1,2], Tevatron [3] and LHC [4][5][6][7][8][9][10][11][12] demonstrated that the study of photon-induced interactions in hadronic colliders is feasible and that it can be used to, among other things, improve our knowledge on the nuclear gluon distribution [13][14][15][16][17][18][19], on details of QCD dynamics [20][21][22][23][24][25][26][27][28][29][30], on the mechanism of quarkonium production [29][30][31][32][33][34][35][36], on the Odderon [37,38] and on the photon flux of the proton [39,40]. These data have stimulated the development of the theoretical description of these processes as well as the proposal of new forward detectors to be installed in the LHC [41,42].The basic idea in the photon-induced processes is that an ultra relativistic charged hadron (proton or nucleus) creates strong electromagnetic fields. A photon stemming from the electromagnetic field of one of the two colliding hadrons can interact with one photon coming from the other hadron a e-mails: barros@ufpel.edu.br;victor.goncalves@thep.lu.se (photon-photon process) or it can interact directly with the other hadron (photon-hadron process) [43][44][45][46][47][48]. In these processes the total cross section can be factorized in terms of the flux of equivalent photons from the hadron projectile and the photon-photon or photon-target production cross section. In this paper we will focus on two-photon interactions in hadronic collisions. Experimental results on exclusive twophoton production of W + W − and + − pairs in γ γ interactions reported by the CMS and ATLAS Collaborations [9][10][11][12] have demonstrated that it is possible to measure such events with the experimental apparatus already available at the LHC, allowing for novel studies of QCD at very high energies and searches for Beyond Standard Model Physics (see, e.g., Ref. [49][50][51][52][53][54][55][56][57][58][59]). This motivates us to revisit the analysis of double vector meson production in ultra peripheral heavy ion collisions performed some time ago in Refs. [60][61][62...

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Quarkonium production in coherent hadron-hadron interactions at the CERN LHC

Cited by 48 publications

References 53 publications

Diffractive photoproduction of Z0 bosons in coherent interactions at CERN-LHC

Diffractive photoproduction of Z0 bosons in coherent interactions at CERN-LHC

Gluon tomography from deeply virtual Compton scattering at small x

Double vector meson production in $$\gamma \gamma $$ γ γ interactions at hadronic colliders

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