期刊
PHYSICAL REVIEW C
卷 92, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.92.055201
关键词
-
资金
- US Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC05-06OR23177, DE-FG02-96ER40960]
- US National Science Foundation
- Italian Instituto Nazionale di Fisica Nucleare
- French Centre National de la Recherche Scientifique
- French Commissariat a l'Energie Atomique
- Emmy Noether grant from the Deutsche Forschungs Gemeinschaft
- Scottish Universities Physics Alliance (SUPA)
- United Kingdom's Science and Technology Facilities Council
- Chilean Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
- National Research Foundation of Korea
- Science and Technology Facilities Council [ST/J000175/1, 1511780, ST/L005719/1, 1264251] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [1307340, 1505615] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1205782, 1305536] Funding Source: National Science Foundation
- STFC [ST/J000175/1, ST/L005719/1] Funding Source: UKRI
We present the final results for the deuteron spin structure functions obtained from the full data set collected in 2000-2001 with Jefferson Lab's continuous electron beam accelerator facility (CEBAF) using the CEBAF large acceptance spectrometer (CLAS). Polarized electrons with energies of 1.6, 2.5, 4.2, and 5.8 GeV were scattered from deuteron ((ND3)-N-15) targets, dynamically polarized along the beam direction, and detected with CLAS. From the measured double-spin asymmetry, the virtual photon absorption asymmetry A(1)(d) and the polarized structure function g(1)(d) were extracted over a wide kinematic range (0.05 GeV2 < Q(2) < 5 GeV2 and 0.9 GeV < W < 3 GeV). We use an unfolding procedure and a parametrization of the corresponding proton results to extract from these data the polarized structure functions A(1)(n) and g(1)(n) of the (bound) neutron, which are so far unknown in the resonance region, W < 2 GeV. We compare our final results, including several moments of the deuteron and neutron spin structure functions, with various theoretical models and expectations, as well as parametrizations of the world data. The unprecedented precision and dense kinematic coverage of these data can aid in future extractions of polarized parton distributions, tests of perturbative QCD predictions for the quark polarization at large x, a better understanding of quark-hadron duality, and more precise values for higher-twist matrix elements in the framework of the operator product expansion.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据