@article{10272/24821,
year = {2024},
month = {9},
url = {https://hdl.handle.net/10272/24821},
abstract = {Given the unique role played by the gravitational form factors (GFFs) in unraveling the internal
mechanics of hadrons, we examine the GFFs of ground state pseudoscalar mesons π, ηc, ηb and the
hypothetical strangeonium ηs(ss). We adopt the coupled framework of Dyson-Schwinger and Bethe-
Salpeter equations within a contact interaction and employ a novel approach to the dressed amputated
meson-meson scattering amplitude, which makes connection with the energy-momentum tensor and
with the GFFs. The resulting GFFs fulfill the anticipated symmetry constraints. The corresponding
charge and mass radii and the D term are also computed. We show that the D term for the pseudoscalar
mesons is bounded within the ð−1;−1=3Þ range; these bounds correspond to the massless (chiral limit)
and infinitely massive cases, respectively. Considering the current interest in the GFFs, understanding
the D term of pseudoscalar mesons and their GFFs can provide an important first step for future
endeavors in the field.},
organization = {This work is supported by the National Natural Science Foundation of China (Grant No. 12135007), the Spanish MICINN Grant No. PID2022-140440NB-C22, and the regional Andalusian Project No. P18-FR-5057. A. B. acknowledges Coordinación de la Investigación Científica, Universidad Michoacana de San Nicolás de Hidalgo Grant No. 4.10. A. B. also wishes to thank Beatriz-Galindo support during his current stay at the University of Huelva, Huelva, Spain.},
publisher = {American Physical Society (APS)},
title = {Gravitational form factors of pseudoscalar mesons in a contact interaction},
doi = {10.1103/PhysRevD.110.054034},
author = {Sultan, M. Atif and Xing, Zanbin and Raya, Khépani and Bashir, Adnan and Chang, Lei},
}