Recoil order chiral corrections to baryon octet axial vector currents and largeNcQCD

2002/01/31 by Shi-Lin Zhu, G. G. Sacco, G. Sacco +2 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.66.034021

published as Phys.Rev. D66 (2002) 034021 · 7 pages

arxiv created 2002/06/26 · openalex publication_date 2002/08/20 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We compute the chiral corrections to octet baryon axial vector currents through O(p³) in heavy baryon chiral perturbation theory, including both octet and decuplet baryon intermediate states. We include the latter in a consistent way by using the small scale expansion. We find that, in contrast to the situation at O(p²), there exist no cancellations between octet and decuplet contributions at O(p³). Consequently, the O(p³) corrections spoil the expected scaling behavior of the chiral expansion. We discuss this result in terms of the 1/N_c expansion. We also consider the implications for the determination of the strange quark contribution to the nucleon spin from polarized deep inelastic scattering data.

Citations

• Baryon hyperfine mass splittings large N QCD
• Spin-flavor structure of largeNcbaryons
• Chiral Dynamics in Nucleons and Nuclei

Cited by

• Effective noise reduction techniques for disconnected loops in Lattice QCD