Charmonium-nucleon femtoscopy as a possible probe of the nucleon gravitational form factor
Abstract
We investigate the charmonium-nucleon interaction, focusing on its connection with the internal structure of the nucleon encoded in the gravitational form factors. To describe this interaction, we employ an effective potential based on the QCD multipole expansion within the leading chromoelectric dipole approximation. In this framework, the potential is expressed in terms of the energy and pressure distributions inside the nucleon. We first construct these distributions from the gravitational form factors fitted to lattice-QCD data. The remaining model parameters are then fixed by requiring that the resulting J/ψ-N potential reproduce the HAL QCD potential outside the short-distance region, as well as the scattering phase shift estimated from the HAL QCD data. Based on this potential, we evaluate the J/ψ-N correlation function and further investigate the ψ(2S)-N system. We then examine the sensitivity of these correlation functions to the nucleon D-form factor.
Versions
Related
- From hyperon--nucleon interactions to deuteron--hyperon femtoscopy
- Nucleon Strong-Interactions Size From Charmonium Photoproduction
- Gluon gravitational form factors of the proton from near-threshold charmonium photoproduction
- Probing the nucleon axial form factor via the e⃗ + + 2H → ν̅e + p + p reaction below the pion-production threshold
- Gravitational D-form factors of the nucleon and pion with mixing between two-quark and four-quark states
BibTeX
@misc{ejima2026charmoniumnucleon,
title = {{Charmonium-nucleon femtoscopy as a possible probe of the nucleon gravitational form factor}},
author = {Ren Ejima and Daisuke Fujii and Mamiya Kawaguchi},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2607.00650},
eprint = {2607.00650},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.00650},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Charmonium-nucleon femtoscopy as a possible probe of the nucleon gravitational form factor
AU - Ren Ejima
AU - Daisuke Fujii
AU - Mamiya Kawaguchi
PY - 2026
DA - 2026/09/29
PB - arXiv
DO - 10.48550/arxiv.2607.00650
UR - https://arxiv.org/abs/2607.00650
AB - We investigate the charmonium-nucleon interaction, focusing on its connection with the internal structure of the nucleon encoded in the gravitational form factors. To describe this interaction, we employ an effective potential based on the QCD multipole expansion within the leading chromoelectric dipole approximation. In this framework, the potential is expressed in terms of the energy and pressure distributions inside the nucleon. We first construct these distributions from the gravitational form factors fitted to lattice-QCD data. The remaining model parameters are then fixed by requiring that the resulting J/ψ-N potential reproduce the HAL QCD potential outside the short-distance region, as well as the scattering phase shift estimated from the HAL QCD data. Based on this potential, we evaluate the J/ψ-N correlation function and further investigate the ψ(2S)-N system. We then examine the sensitivity of these correlation functions to the nucleon D-form factor.
ER -