Deep Inelastic Scattering of Polarized Electrons by Polarized $^3$He and the Study of the Neutron Spin Structure
| dc.creator | The E142 Collaboration | |
| dc.creator | al, P. L. Anthony et | |
| dc.date | 1996-10-14 | |
| dc.date.accessioned | 2026-07-07T10:32:15Z | |
| dc.date.available | 2026-07-07T10:32:15Z | |
| dc.description | The neutron longitudinal and transverse asymmetries $A^n_1$ and $A^n_2$ have been extracted from deep inelastic scattering of polarized electrons by a polarized $^3$He target at incident energies of 19.42, 22.66 and 25.51 GeV. The measurement allows for the determination of the neutron spin structure functions $g^n_1 (x,Q^2)$ and $g^n_2(x,Q^2)$ over the range $0.03 < x < 0.6$ at an average $Q^2$ of 2 (GeV$/c)^2$. The data are used for the evaluation of the Ellis-Jaffe and Bjorken sum rules. The neutron spin structure function $g^n_1 (x,Q^2)$ is small and negative within the range of our measurement, yielding an integral ${\int_{0.03}^{0.6} g_1^n(x) dx}= -0.028 \pm 0.006 (stat) \pm 0.006 (syst) $. Assuming Regge behavior at low $x$, we extract $Γ_1^n=\int^1_0 g^n_1(x)dx = -0.031 \pm 0.006 (stat)\pm 0.009 (syst) $. Combined with previous proton integral results from SLAC experiment E143, we find $Γ_1^p - Γ_1^n = 0.160 \pm 0.015$ in agreement with the Bjorken sum rule prediction $Γ^p_1 - Γ^n_1 = 0.176 \pm 0.008$ at a $Q^2$ value of 3 (GeV$/c)^2$ evaluated using $α_s = 0.32\pm 0.05$. | |
| dc.description | 97 pages, format is postscript file | |
| dc.identifier | https://arxiv.org/abs/hep-ex/9610007 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/9610007 | |
| dc.identifier | Phys.Rev.D54:6620-6650,1996 | |
| dc.identifier | doi:10.1103/PhysRevD.54.6620 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/178694 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Deep Inelastic Scattering of Polarized Electrons by Polarized $^3$He and the Study of the Neutron Spin Structure | |
| dc.type | text |