Pion and nucleon relativistic charge four-current distributions - Archive ouverte HAL
Article Dans Une Revue Physical Review D Année : 2022

Pion and nucleon relativistic charge four-current distributions

Yi Chen
  • Fonction : Auteur
Cédric Lorcé

Résumé

The quantum phase-space approach allows one to define relativistic spatial distributions inside a target with arbitrary spin and arbitrary average momentum. We apply this quasiprobabilistic formalism to the whole charge four-current operator in the case of spin-$0$ and spin-$\frac{1}{2}$ targets, study in detail the frame dependence of the corresponding spatial distributions, and compare our results with those from the light-front formalism. While former works focused on the charge distributions, we extend here the investigations to the current distributions. We clarify the role played by the Wigner rotation and argue that electromagnetic properties are most naturally understood in terms of Sachs form factors, contrary to what the light-front formalism previously suggested. Finally, we illustrate our results using the pion and nucleon electromagnetic form factors extracted from experimental data.

Dates et versions

hal-03822973 , version 1 (20-10-2022)

Identifiants

Citer

Yi Chen, Cédric Lorcé. Pion and nucleon relativistic charge four-current distributions. Physical Review D, 2022, 106 (11), pp.116024. ⟨10.1103/PhysRevD.106.116024⟩. ⟨hal-03822973⟩
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