Dispersion Analysis of the Strange Vector Form Factors of the Nucleon
| dc.creator | Forkel, Hilmar | |
| dc.date | 1996-07-28 | |
| dc.date.accessioned | 2026-07-07T11:14:39Z | |
| dc.date.available | 2026-07-07T11:14:39Z | |
| dc.description | We analyze the nucleon matrix element of the strange quark vector current in a nucleon--model independent dispersive approach with input from the current world data set for the isoscalar electromagnetic form factors. The update of Jaffe's minimal 3-pole ansatz for the spectral functions yields a 40% larger (Sachs) strangeness radius, $(r_s^2)_{Sachs} = 0.20 {\rm fm}^2$, and a by 20% reduced magnitude of the strangeness magnetic moment, $μ_s = -0.26$. In the pole approximation these values are shown to be upper bounds. After extending the ansatz in order to implement the asymptotic QCD momentum dependence (which the 3-pole form factors cannot reproduce), we find the magnitude of the 3-pole results reduced by up to a factor of 2.5. The signs of the leading moments originate primarily from the large $ϕ$-meson couplings and are generic in the pole approximation. | |
| dc.description | 41 pages, RevTeX file and 4 postscript figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9607452 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9607452 | |
| dc.identifier | Phys.Rev.C56:510-525,1997 | |
| dc.identifier | doi:10.1103/PhysRevC.56.510 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/192146 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Nuclear Theory | |
| dc.title | Dispersion Analysis of the Strange Vector Form Factors of the Nucleon | |
| dc.type | text |