ar X iv : 0 90 6 . 09 28 v 1 [ nu cl - e x ] 4 J un 2 00 9 Quark - Hadron Duality in Neutron Spin - Structure and g 2 moments at intermediate
نویسنده
چکیده
Jefferson Lab experiment E01-012 measured the 3He spin-structure functions and virtual photon asymmetries in the resonance region in the momentum transfer range 1.0<Q2<4.0 (GeV/c)2. Our data, when compared with existing deep inelastic scattering data, were used to test quark-hadron duality in g1 and A1 for 3He and the neutron. In addition, preliminary results on the 3He spin-structure function g2, on the Burkhardt-Cottingham sum rule and on higher twist effects through the x2-weighted moment d2 of the neutron were presented.
منابع مشابه
ar X iv : 0 90 7 . 14 75 v 1 [ nu cl - e x ] 9 J ul 2 00 9 Spin Sum Rules at Low Q
Recent precision spin-structure data from Jefferson Lab have significantly advanced our knowledge of nucleon structure at low Q2. Results on the neutron spin sum rules and polarizabilities in the low to intermediate Q2 region are presented. The Burkhardt-Cuttingham Sum Rule was verified within experimental uncertainties. When comparing with theoretical calculations, results on spin polarizabili...
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Recent progress from Jefferson Lab has significantly improved our understanding of the nucleon spin structure in the high-x region. Results of a precision measurement of the neutron spin asymmetry, A1, in the high-x (valence quark) region are discussed. The up and down quark spin distributions in the nucleon were extracted. A2 was also measured. The results were used, in combination with existi...
متن کاملQuark-hadron duality in neutron (3He) spin structure.
We present experimental results of the first high-precision test of quark-hadron duality in the spin-structure function g_{1} of the neutron and 3He using a polarized 3He target in the four-momentum-transfer-squared range from 0.7 to 4.0 (GeV/c);{2}. Global duality is observed for the spin-structure function g_{1} down to at least Q;{2}=1.8 (GeV/c);{2} in both targets. We have also formed the p...
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