Instantons, Spin Crisis and High $Q^2$ Anomaly at HERA
| dc.creator | Kochelev, N. I. | |
| dc.date | 1997-10-30 | |
| dc.date | 1997-11-10 | |
| dc.date.accessioned | 2026-07-07T04:02:45Z | |
| dc.date.available | 2026-07-07T04:02:45Z | |
| dc.description | The contribution of the nonperturbative quark-gluon interaction induced by the instantons to $g_1^p(x,Q^2)$ and $F_2^p(x,Q^2)$ structure functions is estimated. It is shown that nontrivial $Q^2$ dependence of the instanton contribution to $g_1^p(x,Q^2)$ allows us to explain the observed decreasing of the part of the proton spin carried by quarks without involving a large positive gluon polarization. It is demonstrated that the anomalous enhancement of the instanton contribution to $F_2^p(x,Q^2)$ structure function, due to multiple emission of the gluons from instanton vertex, can be one of the reasons for the excess of the DIS events at HERA at high $Q^2 $ and $x$. | |
| dc.description | 9 pages, Latex, 3 figures. To appear in Proc. Workshop ``Physics with Polarized Protons at HERA'' August 1997,DESY-Zeuthen | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9710540 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9710540 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/47367 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Instantons, Spin Crisis and High $Q^2$ Anomaly at HERA | |
| dc.type | text |