PreprintCC BY 4.0arXiv
Photon and gluon gravitational form factors of proton in QCD
Abstract
The energy momentum tensor allows us to probe the internal gravitational structure of the proton. The corresponding gravitational form factors contain information about its different contributions. In this work, we investigate the photon and gluon gravitational form factors of the proton within the QCD sum rule approach. Four independent gravitational form factors are computed in the range 0<Q2<2 GeV2. The mass and scalar radii of the photon and gluon sectors are obtained in the forward limit. We find that the gluon mass radius is smaller than the photon mass radius. These results may be useful for future lattice QCD calculations and phenomenological studies.
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BibTeX
@misc{asmaee2026photon,
title = {{Photon and gluon gravitational form factors of proton in QCD}},
author = {Z. Asmaee and K. Azizi},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2608.23788},
eprint = {2608.23788},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.23788},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Photon and gluon gravitational form factors of proton in QCD
AU - Z. Asmaee
AU - K. Azizi
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2608.23788
UR - https://arxiv.org/abs/2608.23788
AB - The energy momentum tensor allows us to probe the internal gravitational structure of the proton. The corresponding gravitational form factors contain information about its different contributions. In this work, we investigate the photon and gluon gravitational form factors of the proton within the QCD sum rule approach. Four independent gravitational form factors are computed in the range 0<Q^2<2 GeV^2. The mass and scalar radii of the photon and gluon sectors are obtained in the forward limit. We find that the gluon mass radius is smaller than the photon mass radius. These results may be useful for future lattice QCD calculations and phenomenological studies.
ER -