scholarly journals Investigating the impact of the gluon saturation effects on the momentum transfer distributions for the exclusive vector meson photoproduction in hadronic collisions

2017 ◽  
Vol 768 ◽  
pp. 299-304 ◽  
Author(s):  
V.P. Gonçalves ◽  
F.S. Navarra ◽  
D. Spiering
Keyword(s):  
Vector Meson ◽  
Momentum Transfer ◽  
Meson Photoproduction ◽  
Gluon Saturation ◽  
Saturation Effects ◽  
The Impact ◽  
Hadronic Collisions

scholarly journals K0SΣ0 photoproduction at the BGO-OD experiment

2020 ◽  
Vol 241 ◽  
pp. 01009
Author(s):  
Katrin Kohl ◽  
Stefan Alef ◽  
Patrick Bauer ◽  
Reinhard Beck ◽  
Alessandro Braghieri ◽  
...  
Keyword(s):  
Vector Meson ◽  
Momentum Transfer ◽  
Cross Section ◽  
Photon Beam ◽  
Bremsstrahlung Photon ◽  
Meson Photoproduction ◽  
Accelerator Facility ◽  
Transfer Processes

The BGO-OD experiment at the ELSA accelerator facility uses an energy tagged bremsstrahlung photon beam to investigate the excitation structure of the nucleon via meson photoproduction. The setup with a BGO calorimeter surrounding the target and an open dipole spectrometer covering the for ward region is ideally suited for investigating low momentum transfer processes, in particular in strangeness photoproduction. The associated photoproduction of K0S and hyperons is essential to understand the role of K* exchange mech anisms. A cusp-like structure observed in the yp → K0SΣ+ reaction at the K* threshold is described by models including dynamically generated resonances from vector meson-baryon interactions. Such interactions are pre dicted to give a peak like structure in K0SΣ0 photoproduction off the neutron. A very preliminary cross section is determined and compared to the prediction, the results appear to support the model

Exclusive vector meson photoproduction at high energies using the discrete BFKL approach

2020 ◽  
Vol 35 (10) ◽  
pp. 2050057
Author(s):  
Victor P. Goncalves ◽  
Cesar E. Krumreich ◽  
Werner K. Sauter
Keyword(s):  
Vector Meson ◽  
Cross Section ◽  
Phenomenological Study ◽  
Meson Photoproduction ◽  
Nonlinear Saturation ◽  
Text Data ◽  
High Energies ◽  
Bfkl Approach ◽  
Free Parameters ◽  
Saturation Effects

A phenomenological study of the exclusive vector meson photoproduction within the discrete BFKL approach is performed. We estimate the BFKL amplitude in terms of a discrete set of eigenfunctions and use the HERA [Formula: see text] data to constrain the free parameters of the model. As a consequence, we derive a parameter free prediction of the energy dependence of the exclusive vector meson cross section. We demonstrate that the HERA and LHCb data for the exclusive [Formula: see text] and [Formula: see text] photoproduction are quite well describe in a large energy range. However, the model overestimates the precise LHCb data for the smallest values of [Formula: see text], which can be interpreted as an indication of the onset of nonlinear (saturation) effects in the QCD dynamics.

scholarly journals Color dipole predictions for the exclusive vector meson photoproduction in pp , pPb , and PbPb collisions at run 2 LHC energies

2017 ◽  
Vol 96 (9) ◽  
Author(s):  
V. P. Gonçalves ◽  
M. V. T. Machado ◽  
B. D. Moreira ◽  
F. S. Navarra ◽  
G. Sampaio dos Santos
Keyword(s):  
Vector Meson ◽  
Meson Photoproduction ◽  
Color Dipole
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