Pion and kaon electromagnetic and gravitational form factors
Yin-Zhen Xu, Minghui Ding, Khépani Raya, Craig D. Roberts, J. Rodrı́guez-Quintero, Sebastian M. Schmidt
Abstract
Abstract 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.
Topics & Concepts
PhysicsGravitonPionCharge radiusParticle physicsMesonGravitationNucleonNeutron starNuclear physicsRADIUSQuantum electrodynamicsQuantum mechanicsProtonComputer scienceComputer securityQuantum Chromodynamics and Particle InteractionsPulsars and Gravitational Waves ResearchParticle physics theoretical and experimental studies