Quark-hadron duality in neutron (3He) spin structure.
نویسندگان
چکیده
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 photon-nucleon asymmetry A1 in the resonance region for 3He and found no strong Q2 dependence above 2.2 (GeV/c);{2}.
منابع مشابه
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
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 ...
متن کامل(a New Proposal to Jeeerson Lab Pac18) Measurement of Neutron ( 3 He) Spin Structure Functions in the Resonance Region
We propose a precision extraction of the neutron spin structure function g 1 and the virtual photon asymmetry An1 in the resonance region over a moderate Q 2 range (up to Q = 4:2(GeV=c)) using a polarized He target. The Bloom-Gilman duality has been experimentally demonstrated for the spin independent structure functions down to small values of Q. The proposed experiment combined with Deep-Inel...
متن کاملComparison of the Light Charged Particles on Scatter Radiation Dose in Thyroid Hadron Therapy
Bachground: Hadron therapy is a novel technique of cancer radiation therapy which employs charged particles beams, 1H and light ions in particular. Due to their physical and radiobiological properties, they allow one to obtain a more conformal treatment, sparing better the healthy tissues located in proximity of the tumor and allowing a higher control of the disease. Â Objective: As it is well ...
متن کاملNew Results on Nucleon Spin Structure
Recent precision spin structure data from Jefferson Lab have significantly advanced our knowledge of nucleon structure in the valence quark (high-x) region and improved our understanding of higher-twist effects, spin sum rules and quark-hadron duality. First, results of a precision measurement of the neutron spin asymmetry, A 1 , in the high-x region are discussed. The new data shows clearly, f...
متن کاملQuark-hadron duality and Q evolution of the GDH integral in the HERMES experiment
First results on quark-hadron duality in the spin sector from the HERMES experiment are reported in the range 1.2 ≤ Q ≤ 12 GeV and 1 ≤ W 2 ≤ 4 GeV. A complete set of measurements of the generalised GDH integrals for the deuteron, proton and neutron is also shown in the same Q range and in the full W 2 range. PACS. 13.60.Hb Total and inclusive cross-sections (including deep-inelastic processes) ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 101 18 شماره
صفحات -
تاریخ انتشار 2008