Non-perturbative QCD spin studies
| dc.creator | Cheng, T. P. | |
| dc.creator | Li, Ling-Fong | |
| dc.date | 1998-11-09 | |
| dc.date.accessioned | 2026-07-07T04:05:41Z | |
| dc.date.available | 2026-07-07T04:05:41Z | |
| dc.description | 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. | |
| dc.description | 12 pages. Plenary talk given at Spin98, Protvino, Sept 9-12, 1998 (Symposium proceedings to be published by World Scientific PC) | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9811279 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9811279 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/48493 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Non-perturbative QCD spin studies | |
| dc.type | text |