Work

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

Year: 2026

Type: article

Abstract: A bstract 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, ρ mech ≈ 0 . 63 fm, ρ mass ≈ 0 . 65 fm, and compare these values with radius estimates from other nonperturbative studies.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep11(2026)061

Authors: Antti Hippeläinen, Niko Jokela, Matti Järvinen

Institutions: University of Helsinki, Pohang University of Science and Technology, Chinese Academy of Sciences, Asia Pacific Center for Theoretical Physics

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W7125408810

FWCI: 1.547

Cites: 58

Cited by: 2

Related to: 10