Gravitational form factors of the proton from near-threshold vector meson photoproduction

Abstract

We embark on a systematical analysis of the quark and gluon gravitational form factors (GFFs) of the proton, by connecting energy-momentum tensor (EMT) and the near-threshold vector meson photoproduction (NTVMP). Concretely, the quark contributions of GFFs are determined by global fitting the cross section of the lightest vector meson ${\rho }^0$ photoproduction. Combined with the gluon GFFs achieved from heavy quarkonium $J/\psi$ photoproduction data, the complete GFFs are obtained and compared with the experimental results and Lattice QCD determinations. In addition, we use the Resonances Via Padé (RVP) method based on the Schlessinger Point Method (SPM) to obtain a model-independent quark $D$-term distribution by direct analytical continuation of Deep Virtual Compton Scattering (DVCS) experimental data. If errors are considered, the results obtained by RVP are basically consistent with those obtained by NTVMP. Moreover, the comprehensive information on GFFs helps us to uncover the mass distribution and mechanical properties inside the proton. This work is not only an important basis for delving the proton enigmatic properties, unraveling the secrets of the proton internal nature but also have significance theoretical guiding for future JLab and EICs experimental measurements.

9 pages,8 figures

References in corpus (19)

• Electron-Ion Collider in China
• Nucleon Form Factors in QCD
• The mass radius of the proton
• Gluon gravitational structure of hadrons of different spin
• QCD Analysis of Near-Threshold Photon-Proton Production of Heavy Quarkonium
• Nucleon mass radii and distribution: Holographic QCD, Lattice QCD and GlueX data
• Phenomenological assessment of proton mechanical properties from deeply virtual Compton scattering
• Photoproduction of the $\omega$ meson off the proton near threshold
• Perturbative QCD Analysis of Near Threshold Heavy Quarkonium Photoproduction at Large Momentum Transfer
• Perturbative Calculations of Gravitational Form Factors at Large Momentum Transfer
• Fresh extraction of the proton charge radius from electron scattering
• Near Threshold Heavy Quarkonium Photoproduction at Large Momentum Transfer
• Systematic analysis of the proton mass radius based on photoproduction of vector charmoniums
• Empirical Determination of the Pion Mass Distribution
• The ${\psi }^{(\ast )}p$ scattering length based on near-threshold charmoniums photoproduction
• Study for a model-independent pole determination of overlapping resonances
• First extraction of the proton mass radius and scattering length $\left|{\alpha }_{{\rho }^{0}p}\right|$ from ${\rho }^0$ photoproduction
• Analysis of the contribution of the quantum anomaly energy to the proton mass
• Gluon gravitational form factors of protons from charmonium photoproduction

Cited by in corpus (4)

• Dispersive Determination of Nucleon Gravitational Form Factors
• Gravitational form factors of pions, kaons and nucleons from dispersion relations
• Energy-momentum tensor form factors and spin density distribution in the nucleon calculated in a quantized Skyrme model with vector mesons
• Analysis of $J/\psi$ and $\psi (2S)$ Charmonium Production in Ultraperipheral Lead-Lead and Proton-Lead Collisions at LHC Energies