https://doi.org/10.1140/epjc/s10052-024-12518-x
Regular Article - Theoretical Physics
Pion and kaon electromagnetic and gravitational form factors
1
Dpto. Ciencias Integradas, Centro de Estudios Avanzados en Fis., Mat. y Comp., Fac. Ciencias Experimentales, Universidad de Huelva, 21071, Huelva, Spain
2
Dpto. Sistemas Físicos, Químicos y Naturales, Univ. Pablo de Olavide, 41013, Sevilla, Spain
3
Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany
4
School of Physics, Nanjing University, 210093, Nanjing, Jiangsu, China
5
Institute for Nonperturbative Physics, Nanjing University, 210093, Nanjing, Jiangsu, China
6
III. Physikalisches Institut B, RWTH Aachen University, 52074, Aachen, Germany
Received:
6
December
2023
Accepted:
3
February
2024
Published online:
26
February
2024
A unified set of predictions for pion and kaon elastic electromagnetic and gravitational form factors is obtained using a symmetry-preserving truncation of each relevant quantum field equation. A key part of the study is a description of salient aspects of the dressed graviton + quark vertices. The calculations reveal that each meson’s mass radius is smaller than its charge radius, matching available empirical inferences; and meson core pressures are commensurate with those in neutron stars. The analysis described herein paves the way for a direct calculation of nucleon gravitational form factors.
© The Author(s) 2024
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