Heavy quark photoproduction in the k ⊥ -factorization approach

Silva

2020

Phys. Rev. D

The production of a quarkonium -pair in exclusive and diffractive processes in pp collisions at the LHC and FCC energies is investigated. We consider the J/ΨJ/Ψ and ΥΥ production in these processes and present predictions for the transverse momentum and rapidity distributions considering the kinematical ranges expected to be covered by central and forward detectors. Results for the cross sections are also presented. Our results indicate that the double J/Ψ production is dominated by the exclusive process, while the double Υ production receive a large contribution of the diffractive process. The impact of the modelling of the gap survival factor on our predictions is discussed.

supporting

confidence: 79%

mentioning

confidence: 96%

mentioning

confidence: 99%

See 1 more Smart Citation

Exclusive and diffractive quarkonium-pair production at the LHC and FCC

Silva

2020

Phys. Rev. D

“…(20), with a threshold factor (1 − x) n thres , taking n thres = 5 for a 3-flavor analysis and n thres = 7 for a 4-flavor one. This procedure ensures consistent description of heavy quark production at the fixed target data [38].…”

Section: Dipole-nucleus Cross Section In the Saturation Modelmentioning

confidence: 99%

Nuclear exclusive vector meson photoproduction

Machado

2004

Eur. Phys. J. C

Self Cite

We calculate the nuclear cross section for vector meson exclusive photoproduction within the QCD color dipole picture and in the Regge approach. For the former approach, we have considered the phenomenological saturation model, whereas for the latter we use a model based on the dipole Pomeron framework. Theoretical estimates for scattering on both light and heavy nuclei are given over a large range on energy.

“…energy, W γ A , in the heavy quark photoproduction case as x = 4m 2 Q /W 2 γ A , as in the collinear case. The cross section for the heavy-quark photoproduction process is given by the convolution of the unintegrated gluon function with the off-shell matrix elements [33,34,35,36]. Considering only the direct component of the photon we have that σ phot tot reads as [35],…”

Section: The K ⊥ -Factorization Formalismmentioning

confidence: 99%

The QCD pomeron in ultraperipheral heavy ion collisions: III. Photonuclear production of heavy quarks

Machado

2003

Eur. Phys. J. C

Self Cite

We calculate the photonuclear production of heavy quarks in ultraperipheral heavy ion collisions. The integrated cross section and the rapidity distribution are computed employing sound high energy QCD formalisms as the collinear and semihard approaches as well as the saturation model. In particular, the color glass condensate (CGC) formalism is also considered using a simple phenomenological parameterization for the color field correlator in the medium, which allow us to obtain more reliable estimates for charm and bottom production at LHC energies.