2010/03/12 by M. Wakamatsu, Wakamatsu, M.
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research
paper · pdf · doi:10.48550/arxiv.1003.2457
The recent global analysis of helicity parton distributions, which takes into account available data from inclusive and semi-inclusive polarized deep inelastic scattering, as well as from polarized proton-proton scattering at RHIC, appears to offer the first strong evidence that polarized sea-quark distributions are flavor asymmetric, i.e. Δu(x) ≠ Δd(x). We point out that the flavor symmetry breaking pattern indicated by their analysis, i.e. Δu(x) > 0 and Δd(x) < 0 with the magnitude correlation |Δu(x)| < |Δd(x)|, is just consistent with our theoretical predictions given several years ago on the basis of the chiral quark soliton model. We also address ourselves to understanding the physics behind this observation.