Systematic analysis of the proton mass radius based on photoproduction of vector charmoniums

Abstract

In this work, the cross-section of the reaction $\gamma p\to V(J/\psi ,\psi (2S))p$ from the production threshold to medium energy is studied and systematically analyzed within two gluon exchange model. The obtained numerical results are in agreement with experimental data and other theoretical predictions. Under the assumption of the scalar form factor of dipole form, the value of proton mass radius is calculated as $0.55\pm 0.09$ fm and $0.77\pm 0.12$ fm from the fit to the predicted $J/\psi$ and $\psi (2S)$ differential cross-section, respectively. Finally the average value of proton mass radius is estimated to be $\sqrt{⟨R_m^2⟩}=0.67\pm 0.11$ fm. Moreover, one find that extracting mass radius from the near-threshold differential cross-section of heavy quarkoniums is always affected by large $|t{|}_{min}$. These obtained results may provide important theoretical reference for understanding of nucleon structure and future relevant experiments.

arXiv comment7pages, 10figures

References in corpus (37)

• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• Deeply Virtual Compton Scattering
• Diffractive Leptoproduction of Vector Mesons in QCD
• High-precision determination of the electric and magnetic form factors of the proton
• Electron-Ion Collider in China
• Exclusive photoproduction of J/psi mesons at HERA
• STARlight: A Monte Carlo simulation program for ultra-peripheral collisions of relativistic ions
• New measurement of the $1S-3S$ transition frequency of hydrogen: contribution to the proton charge radius puzzle
• High Precision Measurement of the Proton Elastic Form Factor Ratio ${\mu }_p{G}_E/G_M$ at low $Q^2$
• First measurement of near-threshold J/$\psi$ exclusive photoproduction off the proton
• Exclusive J/$\psi$ photoproduction off protons in ultra-peripheral p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Exclusive $J/\psi$ and $\psi (2S)$ production in $pp$ collisions at $\sqrt{s}=7$ TeV
• Defining the Proton Radius: a Unified Treatment
• Diffractive $\varphi$-meson photoproduction on proton near threshold
• Diffractive photoproduction of $J/\psi$ and ${\rm Y}$ using holographic QCD: gravitational form factors and GPD of gluons in the proton
• The mass radius of the proton
• Two-gluon form factor of the nucleon and $J/\psi$ photoproduction
• QCD Analysis of Near-Threshold Photon-Proton Production of Heavy Quarkonium
• Diffractive Photoproduction of Psi(2S) Mesons at HERA
• Central exclusive production of $J/\psi$ and $\psi (2S)$ mesons in $pp$ collisions at $\sqrt{s}=13$TeV
• Energy dependence of exclusive $J/\psi$ photoproduction off protons in ultra-peripheral p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Near threshold $J/\psi$ and ${\rm Y}$ photo-production at JLab and RHIC
• Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory
• Long-Range Forces of QCD
• Theoretical uncertainties in exclusive electroproduction S-wave heavy quarkonia
• Accessing the real part of the forward $J/\psi$-p scattering amplitude from $J/\psi$ photo-production on protons around threshold
• The Origin of Proton Mass from J/$\mathrm{\Psi }$ Photo-production Data
• Exclusive J/Psi and Psi(2s) photo-production as a probe of QCD low x evolution equations
• XYZ spectroscopy at electron-hadron facilities: Exclusive processes
• Extraction of the proton mass radius from the vector meson photoproductions near thresholds
• Double Polarization Observables in Pentaquark Photoproduction
• Photoproduction of charged final states in ultra-peripheral collisions and electroproduction at an electron-ion collider
• Near-threshold photoproduction of $J/\psi$ in two-gluon exchange model
• Estimation of ${\rm Y}$(1S) production in ep process near threshold
• Pauli radius of the proton
• Production of vector mesons in pentaquark states resonance channel in $p$-$A$ ultraperipheral collisions
• Production of the bottomonium-like states $Z_b$ states at $e$-$h$ and ultraperipheral $h$-$h$ collisions

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