Comments: 11 pages (postscript), , hep-ph/0208242 Journal-ref: Accepted for publication in special issue of Hadronic Journal
of nucleon strangeness and spin, including (1) gluon spin in QCD, (2) Bjorken sum rule and QCD, (3) D-E meson mixing and tadpole leakage. All three approaches suggest that ~40% of the nucleon's spin (as well as its momentum) resides with quarks, but that less than 6% is due to strange quarks. |
Comments: 14 pages (postscript), 4 figures , hep-ph/9911284 Journal-ref: Phys. Rev. D 62, 037901 (2000)
meson ground state isoscalar sigma(600-700) and isospinor kappa(800-900) from detection in a_{1}->pi(pipi)_{swave}, gammagamma->2pi^{0}, pi^{-}p->pi^{-}pi^{+}n and K^{-}p->K^{-}pi^{+}n processes. While pseudoscalar meson PVV transitions are known to be determined by (only) quark loop diagrams, the above SPT also constrains scalar meson SVV transitions to be governed (only) by meson loop diagrams. We apply this latter SVV theorem to a_{0}->gammagamma and f_{0}->gammagamma decays. |
Comments: 19 pages (postscript) , figures, hep-ph/9812424 Journal-ref: Eur.Phys.J. C8 (1999) 527-532.
that the pure boson (phi^{4})_{4} field theory is trivial and apply them instead to the dynamically generated quark-level linear sigma model. This cutoff approach leads to the conclusion that the latter field theory is in fact nontrivial. |
Comments: 25 pages (postscript) , hep-ph/9708431 Journal-ref: J.Phys. G23 (1997) 1065-1076.
coupling strength in the infrared limit of QCD and in the quark-level linear sigma model. |
|