Relativistic spin sum rules and the role of the pivot - Archive ouverte HAL
Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2021

Relativistic spin sum rules and the role of the pivot

Cédric Lorcé

Résumé

Spin sum rules depend on the choice of a pivot, i.e. the point about which the angular momentum is defined, usually identified with the center of the nucleon. The latter is however not unique in a relativistic theory and has led to apparently contradictory results in the literature. Using the recently developed phase-space approach, we compute for the first time the contribution associated with the motion of the center of the nucleon, and we derive a general spin sum rule which reduces to established results after appropriate choices for the pivot and the spin component.

Dates et versions

hal-03191149 , version 1 (06-04-2021)

Identifiants

Citer

Cédric Lorcé. Relativistic spin sum rules and the role of the pivot. European Physical Journal C: Particles and Fields, 2021, 81 (5), pp.413. ⟨10.1140/epjc/s10052-021-09207-4⟩. ⟨hal-03191149⟩
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