16 papers · 1 filter
The proton spin puzzle: where are we today ?
Steven D. Bass
The proton spin puzzle has challenged our understanding of QCD for the last 20 years. New measurements of polarized glue, valence and sea quark polarization, including strange quar…
Anomalous glue, eta and eta-prime mesons
Steven D. Bass
Axial U(1) dynamics are characterised by large OZI violations. Here we review the phenomenology of eta and eta-prime production and decay processes, and its connection to the anoma…
Neutrinos from spin dynamics
Steven D. Bass
We conjecture that neutrino physics might correspond to the spontaneous magnetisation phase of an Ising-like spin model interaction coupled to neutrino chirality which operates at…
Towards an understanding of nucleon spin structure: from hard to soft scales
Steven D. Bass, Christine A. Aidala
The workshop "The Helicity Structure of the Nucleon" (BNL June 5, 2006) was organized as part of the 2006 RHIC & AGS Users' Meeting to review the status of the spin problem and fut…
Gluonic effects in eta- and etaprime-nucleon and nucleus interactions
Steven D. Bass
Gluonic degrees of freedom play an important role in the masses of the eta and etaprime mesons. We discuss eta- and etaprime-nucleon and nucleus interactions where this glue may be…
The Spin Structure of the Proton
Steven D. Bass
This article reviews our present understanding of the QCD spin structure of the proton. We first outline the proton spin puzzle and its possible resolution in QCD. We then review t…