Proton Spin Based On Chiral Dynamics
arXiv:hep-ph/9904405 · doi:10.1007/s006010050110
Abstract
Chiral spin fraction models agree with the proton spin data only when the chiral quark-Goldstone boson couplings are pure spinflip. For axial-vector coupling from soft-pion physics this is true for massless quarks but not for constituent quarks. Axial-vector quark-Goldstone boson couplings with {\bf constituent} quarks are found to be inconsistent with the proton spin data.
8 pages, Latex, 1 table, no figures