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| Author | : Whitney Richard Armstrong |
| Publisher | : |
| Total Pages | : 193 |
| Release | : 2015 |
| Genre | : |
| ISBN | : |
The Spin Asymmetries of the Nucleon Experiment (SANE) measured the proton spin structure function g2 in a range of Bjorken x, 0.3
| Author | : Stephen Zachary Saroff |
| Publisher | : |
| Total Pages | : 664 |
| Release | : 1988 |
| Genre | : Hadron interactions |
| ISBN | : |
| Author | : Vernon W Hughes |
| Publisher | : World Scientific |
| Total Pages | : 434 |
| Release | : 1995-07-14 |
| Genre | : Technology & Engineering |
| ISBN | : 9814548804 |
The topic of the internal spin structure of the nucleon has become an unusually active subfield of particle and nuclear physics, together with the relevant technologies. This volume presents up-to-date coverage.All the talks given at the symposium can be found in the volume. In addition, selected articles are reprinted, including two early papers which record initial thinking about the topic, all experimental papers giving data on nucleon spin structure functions determined from polarized lepton-nucleon scattering, and two valuable previously unpublished papers.
| Author | : |
| Publisher | : |
| Total Pages | : 238 |
| Release | : 2011 |
| Genre | : |
| ISBN | : |
The Spin Asymmetries of the Nucleon Experiment investigated the spin structure of the proton via inclusive electron scattering at the Continuous Electron Beam Accelerator Facility at Jefferson Laboratory in Newport News, VA. A double-polarization measurement of polarized asymmetries was performed using the University of Virginia solid polarized ammonia target with target polarization aligned longitudinal and near transverse to the electron beam, allowing the extraction of the spin asymmetries A1 and A2, and spin structure functions g1 and g2. Polarized electrons of energies of 4.7 and 5.9 GeV were scattered to be viewed by a novel, non-magnetic array of detectors observing a four-momentum transfer range of 2 to 6 GeV2. This document addresses the extraction of the spin asymmetries and spin structure functions, with a focus on spin structure function g2, which we have measured as a function of x and W in four Q2 bins.
| Author | : William Alexander Tobias |
| Publisher | : |
| Total Pages | : 426 |
| Release | : 2001 |
| Genre | : |
| ISBN | : |
| Author | : Bernard Frois |
| Publisher | : World Scientific |
| Total Pages | : 702 |
| Release | : 1998-02-24 |
| Genre | : |
| ISBN | : 9814545406 |
From its early beginnings at SLAC in the 1970's, the study of nucleon spin structure using polarized lepton beams and polarized nucleon targets has become increasingly important in nuclear and particle physics, with current experiments at several of the world's high energy and nuclear physics laboratories (CERN, DESY, SLAC and Jefferson Lab) and with enormous related theoretical studies. The understanding of the fascinating but complicated problem of nucleon spin structure has progressed substantially, but fundamental questions remain and it can be confidently predicted that future activity will be high.The Erice Course on The Spin Structure of the Nucleon covered both the experimental and theoretical aspects of the subject, and this volume includes the lectures given at the School. In many cases the lecture material has been extended and updated by the authors. In addition, several recent publications on experimental work have been added in an appendix.
| Author | : Robert G. Fersch |
| Publisher | : |
| Total Pages | : 1140 |
| Release | : 2008 |
| Genre | : Protons |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 193 |
| Release | : 2015 |
| Genre | : |
| ISBN | : |
| Author | : David Flay |
| Publisher | : |
| Total Pages | : 339 |
| Release | : 2014 |
| Genre | : |
| ISBN | : |
The current data for the nucleon-virtual photon longitudinal spin asymmetry A1 on the proton and neutron have shown that the ratio of the polarized-to-unpolarized down-quark parton distribution functions, d/d, tends towards -1/2 at large x, in disagreement with the perturbative QCD prediction that d/d approaches 1 but more in line with constituent quark models. As a part of experiment E06-014 in Hall A of Jefferson Lab, double-spin asymmetries were measured in the scattering of a longitudinally polarized electron beam of energies 4.74 and 5.89 GeV from a longitudinally and transversely polarized 3He target in the deep inelastic scattering and resonance region, allowing for the extraction of the neutron asymmetry A1n and the ratios d/d and u/u. We will discuss our analysis of the data and present results for A1 and g1/F1 on both 3He and the neutron, and the resulting quark ratios for the up and down quarks in the kinematic range of 0.2 2 2 for our deep inelastic scattering data. Invoking duality, we also extract A1n and g1n/F1n in the resonance region, characterized by 0.6 2 2. Our measurements are compared to the world data and various theoretical models and more recent predictions using the Dyson-Schwinger Equation approach. We also present analysis of the unpolarized cross section data, which contributes to the g1 spin structure function and eventually the a2 matrix element, an x2-weighted moment of g1. The extracted a2 data are compared to a Lattice QCD calculation.
| Author | : John Koster (IV) |
| Publisher | : |
| Total Pages | : |
| Release | : 2011 |
| Genre | : |
| ISBN | : |
