Determination of the HERA coherent diffractive $J/\psi$ production cross section via artificial neural network

Abstract

An exclusive coherent diffractive $J/\psi$ production dataset from HERA, covering a large kinematic range in the photon virtuality $Q^2$, the squared momentum transfer $t$, and the photon-proton center-of-mass energy $W$, has been analyzed using various theoretical models with different approaches. In common model analyses, the inherent assumptions and limited kinematic applicability somewhat restrict the predictive power of the models, resulting in model-dependent prediction results. In this paper, we present our model-independent approach for the same reaction process and dataset, utilizing an artificial neural network (ANN) technique. The prediction of the best ANN model for the HERA differential cross-section dataset over a range of $W$, $Q^2$, and $t$ is obtained. We then extend the ANN model by combining the HERA and LHC data at various values of $W$ to predict the total photoproduction cross-section and demonstrate how to extract the exponential slope $b$. We find that the exponential slope $b$ strongly depends on $Q^2$ and $W$.

arXiv comment8 figures, 16 pages; revised version

References in corpus (35)

• Computing Quark and Gluon Distribution Functions for Very Large Nuclei
• Gluon Distribution Functions for Very Large Nuclei at Small Transverse Momentum
• Saturation Effects in Deep Inelastic Scattering at low $Q^2$ and its Implications on Diffraction
• The Color Glass Condensate
• Factorization for hard exclusive electroproduction of mesons in QCD
• Saturation in Diffractive Deep Inelastic Scattering
• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• An Impact Parameter Dipole Saturation Model
• Exclusive diffractive processes at HERA within the dipole picture
• Single and Double BFKL Pomeron Exchange and a Dipole Picture of High Energy Hard Processes
• Diffractive Leptoproduction of Vector Mesons in QCD
• Saturation and BFKL dynamics in the HERA data at small x
• Electron-Ion Collider in China
• Evolution at small x_bj: The Color Glass Condensate
• Exclusive photoproduction of J/psi mesons at HERA
• Elastic J/Psi Production at HERA
• Off-diagonal distributions fixed by diagonal partons at small $x$ and $\xi$
• Evidence of strong proton shape fluctuations from incoherent diffraction
• Exclusive electroproduction of J/psi mesons at HERA
• Elastic Photoproduction of J/psi and Upsilon Mesons at HERA
• Hard diffractive electroproduction of vector mesons in QCD
• Colour dipoles and rho, phi electroproduction
• Vector meson leptoproduction and nonperturbative gluon fluctuations in QCD
• Revealing proton shape fluctuations with incoherent diffraction at high energy
• Snowmass 2021 whitepaper: Proton structure at the precision frontier
• Q^2 dependence of diffractive vector meson electroproduction
• The shape of the proton at high energies
• Exclusive vector meson production at HERA
• Central exclusive production of $J/\psi$ and $\psi (2S)$ mesons in $pp$ collisions at $\sqrt{s}=13$TeV
• On the running coupling in the JIMWLK equation
• Elastic Photoproduction of ${\rho }^0$ Mesons at HERA
• Elliptic flow from color-dipole orientation in pp and pA collisions
• Gluon Saturation in the Colour Dipole Model?
• Global Bayesian Analysis of $\mathrm{J}/\psi$ Photoproduction on Proton and Lead Targets
• Exclusive J/$\psi$ Detection and Physics with ECCE

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