Two-component model for the axial form factor of the nucleon
| dc.creator | Adamuščín, C. | |
| dc.creator | Tomasi-Gustafsson, E. | |
| dc.creator | Santopinto, E. | |
| dc.creator | Bijker, R. | |
| dc.date | 2007-06-24 | |
| dc.date | 2008-08-20 | |
| dc.date.accessioned | 2026-07-07T11:57:00Z | |
| dc.date.available | 2026-07-07T11:57:00Z | |
| dc.description | The axial form factor of the nucleon is studied in a two-component model consisting of a three-quark intrinsic structure surrounded by a meson cloud. The experimental data in the space-like region are well reproduced with a minimal number of parameters. The results are similar to those obtained from a dipole fit up to 1 GeV$^2$, but they surprisingly show a zero between 2 and 3 GeV$^2$. Such behavior, predicted by the present model completely disagrees with the dipole parametrization. The theoretical expression for the form factor is then analytically extrapolated to the time-like region, giving the first predictions in this regime. This kinematical region is especially interesting for present and future colliders. | |
| dc.description | 12 pages 2 figures Final version to appear in Phys. Rev. C | |
| dc.identifier | https://arxiv.org/abs/0706.3509 | |
| dc.identifier | http://arxiv.org/abs/0706.3509 | |
| dc.identifier | Phys.Rev.C78:035201,2008 | |
| dc.identifier | doi:10.1103/PhysRevC.78.035201 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/205736 | |
| dc.subject | Nuclear Theory | |
| dc.title | Two-component model for the axial form factor of the nucleon | |
| dc.type | text |