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Peer-reviewedCC BY 4.0Journal of High Energy Physics

Gravitational form factors of the proton in the improved holographic QCD model

  • Antti Hippeläinen1
  • Niko Jokela1
  • Matti Järvinen2,3,4
4 affiliations
  1. 1University of Helsinki
  2. 2Chinese Academy of Sciences
  3. 3Asia Pacific Center for Theoretical Physics
  4. 4Pohang University of Science and Technology
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Abstract

We compute the gluonic contribution to the gravitational form factors of the proton using the improved holographic QCD model, in which the proton is described in terms of bulk Dirac fermions. Model parameters are constrained using lattice and phenomenological input, allowing us to obtain estimates for the gravitational form factors and to compare them with results from other approaches. Using the extracted form factors, we analyze mechanical properties of the proton, including pressure and shear distributions. We obtain estimates for the mechanical and mass radii of the proton, ρmech ≈ 0.63 fm, ρmass ≈ 0.65 fm, and compare these values with radius estimates from other nonperturbative studies.

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Cite

BibTeXRIS
BibTeX
@article{hippelainen2026gravitational,
  title = {{Gravitational form factors of the proton in the improved holographic QCD model}},
  author = {Antti Hippeläinen and Niko Jokela and Matti Järvinen},
  journal = {Journal of High Energy Physics},
  year = {2026},
  month = nov,
  doi = {10.1007/jhep11(2026)061},
  url = {https://link.springer.com/article/10.1007/JHEP11(2026)061},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Gravitational form factors of the proton in the improved holographic QCD model
AU  - Antti Hippeläinen
AU  - Niko Jokela
AU  - Matti Järvinen
PY  - 2026
DA  - 2026/11/06
JO  - Journal of High Energy Physics
DO  - 10.1007/jhep11(2026)061
UR  - https://link.springer.com/article/10.1007/JHEP11(2026)061
AB  - We compute the gluonic contribution to the gravitational form factors of the proton using the improved holographic QCD model, in which the proton is described in terms of bulk Dirac fermions. Model parameters are constrained using lattice and phenomenological input, allowing us to obtain estimates for the gravitational form factors and to compare them with results from other approaches. Using the extracted form factors, we analyze mechanical properties of the proton, including pressure and shear distributions. We obtain estimates for the mechanical and mass radii of the proton, ρmech ≈ 0.63 fm, ρmass ≈ 0.65 fm, and compare these values with radius estimates from other nonperturbative studies.
SN  - 1029-8479
ER  -