Gluon gravitational form factors of the proton in a light-front spectator model
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arXiv
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| Format: | Preprint |
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2025
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| author | Sain, Amrita Choudhary, Poonam Gurjar, Bheemsehan Mondal, Chandan Chakrabarti, Dipankar Mukherjee, Asmita |
| author_facet | Sain, Amrita Choudhary, Poonam Gurjar, Bheemsehan Mondal, Chandan Chakrabarti, Dipankar Mukherjee, Asmita |
| contents | We calculate the gluon gravitational form factors (GFFs) of the proton using a light-front spectator model based on soft-wall AdS/QCD, where the active parton is a gluon. The model parameters are determined by fitting the unpolarized gluon distribution function to the NNPDF3.0nlo dataset. Subsequently, we predict the polarized gluon distribution, finding consistency with global analyses. Our predictions for the gluon GFFs show good agreement with recent lattice QCD simulations and experimental extractions. Using these gluon GFFs, we compute the contribution of the gluon to the proton mass and mechanical radii. We also analyze the gluonic contribution to the two-dimensional Galilean densities, including energy density, radial and tangential pressure, isotropic pressure, and pressure anisotropy of the proton. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_12574 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gluon gravitational form factors of the proton in a light-front spectator model Sain, Amrita Choudhary, Poonam Gurjar, Bheemsehan Mondal, Chandan Chakrabarti, Dipankar Mukherjee, Asmita High Energy Physics - Phenomenology High Energy Physics - Lattice High Energy Physics - Theory Nuclear Theory We calculate the gluon gravitational form factors (GFFs) of the proton using a light-front spectator model based on soft-wall AdS/QCD, where the active parton is a gluon. The model parameters are determined by fitting the unpolarized gluon distribution function to the NNPDF3.0nlo dataset. Subsequently, we predict the polarized gluon distribution, finding consistency with global analyses. Our predictions for the gluon GFFs show good agreement with recent lattice QCD simulations and experimental extractions. Using these gluon GFFs, we compute the contribution of the gluon to the proton mass and mechanical radii. We also analyze the gluonic contribution to the two-dimensional Galilean densities, including energy density, radial and tangential pressure, isotropic pressure, and pressure anisotropy of the proton. |
| title | Gluon gravitational form factors of the proton in a light-front spectator model |
| topic | High Energy Physics - Phenomenology High Energy Physics - Lattice High Energy Physics - Theory Nuclear Theory |
| url | https://arxiv.org/abs/2503.12574 |