Vector meson production in ultraperipheral collisions at the LHC

Fiore, R.; Jenkovszky, L. L.; Libov, V.; Machado, M. V. T.

doi:10.1007/s11232-015-0252-8

Cited by 10 publications

(13 citation statements)

References 11 publications

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“…The predictions of this paper are close to the results in Ref. [38,45]. We use the bCGC models with parameters fitted from combined H1 and ZEUS data and we present the detail parameters for the Boosted Gaussian wave functions and rapidity gap survival factors.…”

Section: Numerical Results and Discussionsupporting

confidence: 81%

Photoproduction of vector mesons in proton–proton ultraperipheral collisions at the CERN Large Hadron Collider

Xie

Chen

2018

Int. J. Mod. Phys. A

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Photoproduction of vector mesons are computed in dipole model in proton-proton ultraperipheral collisions(UPCs) at the CERN Larger Hadron Collider (LHC). The dipole model framework is employed in the calculations of cross sections of diffractive processes. Parameters of the bCGC model are refitted with the latest experimental data. The bCGC model and Boosted Gaussian wave functions are employed in the calculations. We obtain predictions of rapidity distributions of J/ψ and ψ(2s) mesons in proton-proton ultraperipheral collisions. The predictions give a good descriptions to the experimental data of LHCb. Predictions of φ and ω mesons are also calculated in this paper.

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Section: Numerical Results and Discussionsupporting

confidence: 81%

Photoproduction of vector mesons in proton–proton ultraperipheral collisions at the CERN Large Hadron Collider

Xie

Chen

2018

Int. J. Mod. Phys. A

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“…This mechanism is dominant in the ultraperipheral regime, and the cross section is factorized in two terms: a quasireal photon flux, created from one of the incoming hadrons, and the photoproduction cross section, which characterizes the interaction of the photons with the target hadron. The exclusive photoproduction has been investigated in several works [6][7][8][9][10][11][12]. In one of our last contributions to the subject [6], we calculated the rapidity distribution for the production of Y states in Pb-Pb collisions at energies ffiffi ffi s p ¼ 2.76 TeV and ffiffi ffi s p ¼ 5.02 TeV.…”

Section: Introductionmentioning

confidence: 99%

Heavy meson photoproduction in peripheral AA collisions

Martins

2018

Phys. Rev. D

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The exclusive photoproduction of the heavy vector mesons ψ and Y is investigated in peripheral Pb-Pb collisions for the energies available at the LHC, ffiffi ffi s p ¼ 2.76 TeV and ffiffi ffi s p ¼ 5.02 TeV. To evaluate the robustness of the light-cone color dipole formalism, previously tested in the ultraperipheral regime, the rapidity distribution and the nuclear modification factor (R AA ) are calculated for the three centrality classes: 30%-50%, 50%-70%, and 70%-90%. The ultraperipheral to peripheral regime transition was carried out by sophisticating the photon flux description and the photonuclear cross section, taking into account the effective interaction area. In our calculations, three scenarios were considered: (scenario 1) the direct application of the usual photon flux and of the photonuclear cross section with no relevant change in relation to the ultraperipheral collision (UPCs), (scenario 2) the application of an effective photon flux keeping the photonuclear cross section unchanged, and (scenario 3) also considering an effective photonuclear cross section. The results obtained with the three different scenarios were compared with the ALICE measurements, showing a better agreement with the data (only J=ψ at the moment) in the more complete approach (scenario 3), mainly in the more central regions (30%-50% and 50%-70%) where the uncertainty is smaller.

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“…One of the first hypotheses is that this excess could be originated from coherent photoproduction of the meson in the peripheral region [12]. The photoproduction of heavy vector mesons has already been well explored in ultraperipheral collisions [13][14][15][16][17][18][19][20] and can act as a complement to allow us to obtain information about the gluon distribution in the nuclear medium. However, there are few works in the peripheral collisions regime (in particular, b ≃ 2R A ), where the exclusive photoproduction mechanism may still be relevant for the heavy vector mesons production.…”

Section: Introductionmentioning

confidence: 99%

J/Ψ photoproduction in peripheral AA collisions

Martins

2017

Phys. Rev. D

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The exclusive photoproduction of the heavy vector mesons J=Ψ is investigated in the context of peripheral lead-lead collisions for the energies available at the LHC, ffiffi ffi s p ¼ 2.76 TeV and ffiffi ffi s p ¼ 5.02 TeV.Using the light-cone color dipole formalism, the rapidity distribution was calculated in two centrality bins at 50%-70% and 70%-90% in order to evaluate its robustness in extrapolating down to a smaller impact parameter. A modified photon flux is introduced, without change in the photonuclear cross section in relation to the ultraperipheral (UPC) case. Results were obtained for the two regions analyzed, which presented a maximum difference of 27% in frontal rapidity for the two regions. Comparing the results for ffiffi ffi s p ¼ 2.76 TeV and ffiffi ffi s p ¼ 5.02 TeV, an increase was verified of approximately half the one obtained in the ultraperipheral regime in the central rapidity region.

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Vector meson production in ultraperipheral collisions at the LHC

Cited by 10 publications

References 11 publications

Photoproduction of vector mesons in proton–proton ultraperipheral collisions at the CERN Large Hadron Collider

Photoproduction of vector mesons in proton–proton ultraperipheral collisions at the CERN Large Hadron Collider

Heavy meson photoproduction in peripheral AA collisions

J/Ψ photoproduction in peripheral AA collisions

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