Imaging the charge distributions of flavor-symmetric and -asymmetric mesons

2025/06/22 by Xu, Yin-Zhen, Bashir, Adnan, Raya, Khépani +2 · 2 citations
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2506.17993

Abstract

We investigate the internal structure of a comprehensive set of pseudoscalar and vector mesons, including both flavor-symmetric and flavor-asymmetric systems, by reconstructing their charge distributions from electromagnetic form factors. To achieve this, we employ a Maximum Entropy Method optimized for charge distributions, utilizing previously published form factor data obtained within the Dyson-Schwingers and Bethe-Salpeter equations framework. Furthermore, we calculate the average distance between the valence quark and antiquark that constitute the meson, interpreting it as an estimate for both the meson's spatial size and the typical range of quark motion. Our results reveal that this distance for the lightest quarkonia is approximately five times larger than that for the heaviest. Moreover, due to spin effects, vector mesons exhibit sizes that are 5-15% larger than their pseudoscalar counterparts.

Citations

• Pion transverse charge density from e⁺e^- annihilation data and logarithmic dispersion relations
• Distribution amplitudes of heavy-light pseudo-scalar and vector mesons from Dyson-Schwinger equations framework
• Mapping spatial distributions within pseudoscalar mesons
• Heavy-light mesons from a flavour-dependent interaction
• Electric, Magnetic and Quadrupole Form Factors and Charge Radii of Vector Mesons: From Light to Heavy Sector in a Contact Interaction
• Charge distributions of pseudo-scalar and vector mesons from Dyson-Schwinger equations
• Pseudoscalar Mesons and Emergent Mass
• The electromagnetic form factors of heavy-light pseudo-scalar and vector mesons
• Pion and kaon electromagnetic and gravitational form factors
• Synchronization effects on rest frame energy and momentum densities in the proton
• Strong two-meson decays of light and charmed vector mesons
• Baryons as relativistic three-quark bound states

Cited by

• Electromagnetic structure of axial-vector mesons and implications for the muon g-2
• Electromagnetic properties of heavy-light mesons

Related

• Charge distributions of pseudo-scalar and vector mesons from Dyson-Schwinger equations
• Mapping spatial distributions within pseudoscalar mesons
• The electromagnetic form factors of heavy-light pseudo-scalar and vector mesons
• The Electromagnetic Form Factors of Pseudoscalar Mesons within the Light-Front Quark Model
• Electric, Magnetic and Quadrupole Form Factors and Charge Radii of Vector Mesons: From Light to Heavy Sector in a Contact Interaction