Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-11-09
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages. Plenary talk given at Spin98, Protvino, Sept 9-12, 1998 (Symposium proceedings to be published by World Scientific P
Scientific paper
A whole class of non-perturbative QCD studies, e.g. the instanton models, chiral quark models, etc. indicates that the effective degrees of freedom for the physics in the low Q^(2) < 1 GeV^(2) region could be the constituent quarks (CQs) and internal Goldstone bosons (IGBs). This leads to a nucleon structure with the spin being carried by three constituent quark systems, each composed of a massive compact CQ surrounded by a q\bar{q} sea perturbatively generated by the valence quark's IGB emissions. Such a CQ-system has a total angular momentum of 1/2 and a small anomalous magnetic moment, built up from a quark-spin polarization and a significant orbital motion in the quark sea. The distinctive phenomenological signal for such a non-perturbative structure is that the sea-quarks are polarized negatively, while the antiquarks are not polarized. This picture also suggests a negligibly small gluon polarization. All such features can be tested by experiments in the near future.
Cheng Ta-Pei
Li Ling-Fong
No associations
LandOfFree
Non-perturbative QCD spin studies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Non-perturbative QCD spin studies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-perturbative QCD spin studies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-11327