Slac Measurement of the Neutron Spin Structure Function
نویسنده
چکیده
A measurement of the nucleon spin asymmetries from deep inelastic scattering of polarized electrons by polarized 3He has been performed. The neutron spin structure function gy is extracted and used to test the Bjorken sum rule. The neutron integral assuming a simple Begge theory extrapolation at low x is Ji gy(x)dx = -0.022f 0.011. Combined with the EMC proton results, the Bjorken sum rule predicts a neutron integral of Jt gy(x)dx = -0.065f0.018. Presented at the 28th Rencontres de Moriond QCD and High Energy Hadronic Interactions Les Arcs, France, March 20-28,1993 *Work supported Ly Department of Energy contract DE-AC03-76SF00515
منابع مشابه
Results and Interpretations of the Spin Structure Experiments at Slac
In the recent experiments E154 and E155 at SLAC the spin-dependent structure functions g 1 , g p 1, and g d 1 of the neutron, proton, and deuteron were measured by scattering longitudinally polarized 48:3 GeV electrons o longitudinally polarized targets. We report on the measurement of g 1 by E154, and on the preliminary results on g p 1 from E155. The SLAC results provide the most precise dete...
متن کاملSlac Experiment E142 "
Deep inelastic scattering experiments to measure the proton spin-dependent structure function were first pioneered in SLAC experiments in the 1970's [l]. These early experiments established the existence of large asymmetries in the spin structure of the proton predicted by the parton model. Despite the success, the results did not appear to be revealing new fundamental insights into the models....
متن کاملSpin and Isospin Asymmetry, Equation of State and Neutron Stars
In the present work, we have obtained the equation of state for neutron star matter considering the in uence of the ferromagnetic and antiferromagnetic spin state. We have also investigated the structure of neutron stars. According to our results, the spin asymmetry stiens the equation of state and leads to high mass for the neutron star.
متن کاملTHE SLAC HIGH–DENSITY GASEOUS POLARIZED 3He TARGET*
A large-scale high-pressure gaseous 3He polarized target has been developed for use with a high-intensity polarized electron beam at the Stanford Linear Accelerator Center. This target was used successfully in an experiment to study the spin structure of the neutron. The target provided an areal density of about 7×1021 nuclei/cm2 and operated at 3He polarizations between about 30% and 40% for t...
متن کاملDeep inelastic scattering of polarized electrons by polarized 3He and the study of the neutron spin structure.
The neutron longitudinal and transverse asymmetries A n 1 and A n 2 have been extracted from deep inelas-tic 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 (Ge...
متن کامل