Tensor-polarized parton density in the N → Δ transition

2025/07/24 by June-Young Kim, Kim, June-Young, Christian Weiß +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2507.18402

openalex publication_date 2025/07/24 · openalex created_date 2025/10/16 · openalex updated_date 2026/07/28

Abstract

The generalized parton distributions for transitions between baryon states with different masses have a forward limit in which they behave as parton densities (light-front momentum transfer Δ⁺, Δ_T = 0, energy transfer Δ^- ≠ 0). These "transition parton densities'' can realize spin/isospin quantum numbers not accessible in the ground-state nucleon. The N → Δ transition gives rise to a new parton density proportional to the 1/2 → 3/2 spin transition tensor. Its properties are derived, and its magnitude is estimated in the chiral quark-soliton model based on the large-N_c limit of QCD.

Citations

• Experimental Study of Tensor Structure Function of Deuteron
• Exploring Baryon Resonances with Transition Generalized Parton Distributions: Status and Perspectives

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