RT Journal Article
T1 Gravitational form factors of pseudoscalar mesons in a contact interaction
A1 Sultan, M. Atif
A1 Xing, Zanbin
A1 Raya, Khépani
A1 Bashir, Adnan
A1 Chang, Lei
AB Given the unique role played by the gravitational form factors (GFFs) in unraveling the internalmechanics of hadrons, we examine the GFFs of ground state pseudoscalar mesons π, ηc, ηb and thehypothetical 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 amputatedmeson-meson scattering amplitude, which makes connection with the energy-momentum tensor andwith the GFFs. The resulting GFFs fulfill the anticipated symmetry constraints. The correspondingcharge and mass radii and the D term are also computed. We show that the D term for the pseudoscalarmesons 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, understandingthe D term of pseudoscalar mesons and their GFFs can provide an important first step for futureendeavors in the field.
PB American Physical Society (APS)
SN 2470-0010
SN 2470-0029 (electrónico)
YR 2024
FD 2024-09
LK https://hdl.handle.net/10272/24821
UL https://hdl.handle.net/10272/24821
LA eng
NO Sultan, M. A., Xing, Z., Raya, K., Bashir, A., & Chang, L. (2024). Gravitational form factors of pseudoscalar mesons in a contact interaction. In Physical Review D (Vol. 110, Issue 5). American Physical Society (APS). https://doi.org/10.1103/physrevd.110.054034
NO 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.
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026