QCD angular momentum in N → Δ transitions

Apr 17, 2023
7 pages
Published in:
  • Phys.Lett.B 844 (2023) 138083
  • Published: Jul 18, 2023
e-Print:
Report number:
  • JLAB-THY-23-3795

Citations per year

202320242025571
Abstract: (Elsevier B.V.)
NΔ transitions offer new possibilities for exploring the isovector component of the QCD quark angular momentum (AM) operator causing the Jud flavor asymmetry in the nucleon. We extend the concept of QCD AM to transitions between baryon states, using light-front densities of the energy-momentum tensor in transversely localized states. We calculate the NΔ transition AM in the 1/Nc expansion, connect it with the Jud flavor asymmetry in the nucleon, and estimate the values using lattice QCD results. In the same setup we connect the transition AM to the transition GPDs sampled in hard exclusive electroproduction processes with NΔ transitions, enabling experimental study of the transition AM.
Note:
  • 7 pages, 1 figure
  • flavor: asymmetry
  • quark: angular momentum
  • energy-momentum: density
  • tensor: energy-momentum
  • quantum chromodynamics
  • nucleon
  • electroproduction
  • baryon
  • generalized parton distribution
  • isovector