Work

Gravitational form factors of pseudoscalar mesons in a contact interaction

Year: 2024

Type: article

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 , η c , η b and the hypothetical η s ( s s ¯ ) . 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 ( − 1 , − 1 / 3 ) 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. Published by the American Physical Society 2024

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.110.054034

Authors: M. Atif Sultan, Zanbin Xing, Khépani Raya, Adnan Bashir, Lei Chang

Institutions: University of the Punjab, Nankai University, Universidad de Huelva, Universidad Michoacana de San Nicolás de Hidalgo

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid