ρ-Meson Form Factors in the Point Form

2017/08/10 by Elmar P. Biernat, Biernat, Elmar P., W. Schweiger +1
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Quantum Chromodynamics and Particle Interactions #Quantum and electron transport phenomena

paper · doi:10.48550/arxiv.1708.03170

openalex publication_date 2017/08/10 · openalex created_date 2022/10/06 · openalex updated_date 2026/07/28

Abstract

We present a calculation of the electromagnetic form factors of the ρ⁺ meson. Our formalism is based on the point-form of relativistic quantum mechanics. Electron-ρ-meson scattering is formulated as a coupled-channel problem for a Bakamjian-Thomas mass operator, such that the dynamics of the exchanged photon is taken explicitly into account. The ρ-meson current is extracted from on-shell matrix elements of the optical potential of the scattering process. As a consequence of the violation of cluster separability in the Bakamjian-Thomas framework, our current includes additional, unphysical contributions, which can be separated from the physical ones uniquely. Our results for the form factors are in good agreement with other approaches.

Related

• The ρ-meson electromagnetic form factors within the light-front quark model
• Relativistic Effects in the Electromagnetic Structure of ρ-meson
• Form factors of the ρ-meson in chiral perturbation theory
• Meson electromagnetic form factors in a relativistic quark model
• Medium effects on the electromagnetic form factors of the ρ meson