Nucleon relativistic polarization and magnetization distributions - Archive ouverte HAL
Article Dans Une Revue Physical Review D Année : 2023

Nucleon relativistic polarization and magnetization distributions

Yi Chen
  • Fonction : Auteur
Cédric Lorcé

Résumé

As a follow up of our work on the electromagnetic four-current, we study for the first time the relativistic polarization and magnetization spatial distributions inside a spin-$\frac{1}{2}$ target within the quantum phase-space approach. While the polarization-magnetization tensor is usually defined in terms of the Gordon decomposition of the electromagnetic four-current, a Breit frame analysis reveals that a physically simpler and more natural picture of the system arises when the polarization-magnetization tensor is instead defined in terms of a Sachs decomposition. Relativistic polarization and magnetization distributions for a moving target are compared with their light-front counterparts. In particular, we show that the genuine light-front magnetization distributions are defined in terms of Fourier transforms of the Sachs magnetic form factor, rather than the Pauli form factor as suggested earlier in the literature. We finally illustrate our results in the case of a nucleon using the electromagnetic form factors extracted from experimental data.

Dates et versions

hal-04006150 , version 1 (27-02-2023)

Identifiants

Citer

Yi Chen, Cédric Lorcé. Nucleon relativistic polarization and magnetization distributions. Physical Review D, 2023, 107 (9), pp.096003. ⟨10.1103/PhysRevD.107.096003⟩. ⟨hal-04006150⟩
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