Download or read book Spin Degrees of Freedom in Electron Nucleon Scattering in the Resonance Region March 1987 written by Volker Burkert and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spin Degrees of Freedom in Electron Nucleon Scattering in the Resonance Region written by Volker D. Burkert and published by . This book was released on 1987 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spin Degrees of Freedom in Electron Nucleon Scattering in the Resonance Region written by and published by . This book was released on 1987 with total page 2060 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some aspects of using polarized electrons and/or polarized targets in electron-nucleon scattering experiments are discussed. Polarization measurements can be used to extend the knowledge of nucleon form-factor measurements to higher Q^2 and are indispensable for model-independent extraction of the helicity amplitudes of exclusive meson production. Measurements of polarization asymmetries may also help in revealing the excitation of weaker resonances.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modern Topics in Electron Scattering written by Bernard Frois and published by World Scientific. This book was released on 1991 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the considerable progress recently achieved in the understanding of nucleon and nuclear structure by using high energy electrons as a probe. A collection of papers discusses in detail the new frontiers of this field. Experimental and theoretical articles cover topics such as the structure of the nucleon, nucleon distributions, many-body correlations, non-nucleonic degrees of freedom and few-body systems. This book is an up-to-date introduction to the research planned with continuous beam electron accelerators.

Download or read book Resonance Estimates for Single Spin Asymmetries in Elastic Electron nucleon Scattering written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss the target and beam normal spin asymmetries in elastic electron-nucleon scattering which depend on the imaginary part of two-photon exchange processes between electron and nucleon. We express this imaginary part as a phase space integral over the doubly virtual Compton scattering tensor on the nucleon. We use unitarity to model the doubly virtual Compton scattering tensor in the resonance region in terms of [gamma]* N → [pi] N electroabsorption amplitudes. Taking those amplitudes from a phenomenological analysis of pion electroproduction observables, we present results for beam and target normal single spin asymmetries for elastic electron-nucleon scattering for beam energies below 1 GeV and in the 1-3 GeV region, where several experiments are performed or are in progress.

Download or read book Spin Dependent Electron Proton Scattering in the N Resonance Region written by Mark Robert Bergstrom and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear and Subnuclear Degrees of Freedom and Lepton Nucleus Scattering written by Amand Faessler and published by Elsevier Science & Technology. This book was released on 1985 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 1, 6, 8-9, 11, 13- consist of Proceedings of the International School of Nuclear Physics.

Download or read book Spin Degrees of Freedom in Electromagnetic Nuclear Physics written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains papers on the following topics: spin polarization in electromagnetic physics at intermediate energies; solid polarized targets; polarized electron sources; measurement of the proton spin structure function; measurement of proton and neutron spin structure at SLAC; spin dependent scattering and the quark content of nucleons; physics of Q squared-dependence in the nucleon's structure function sum rule; electromagnetic spin structure response of nucleons in nuclei; polarimetry in the few Gev region; and polarized photons for nuclear and particle physics. These paper have been cataloged separately elsewhere.

Download or read book Non nucleonic Degrees of Freedom in Intermediate Energy Electron nucleus Scattering written by Nationaal Instituut voor Kernfysica en Hoge-energiefysica (Amsterdam) and published by . This book was released on 1987 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1990-10 with total page 1480 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Spin Observables of Electron nucleon Scattering from the Formalism of Nucleon nucleon Scattering written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Fifth Mini conference non nucleonic Degrees of Freedom in Intermediate Energy Electron nucleus Scattering written by Nationaal Instituut voor Kernfysica en Hoge-Energiefysica (Netherlands). Section K. and published by . This book was released on 1987* with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effective Hadronic Degrees of Freedom in Electron nucleus Scattering written by P. J. Mulders and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Generalized GDH Sum Rule and the Spin Structure of the Neutron written by Jin Yuan and published by . This book was released on 2008 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nucleon spin structure has been of great interest since the CERN SMC experiment found that quarks carry only a small fraction of the nucleon spin. Since naively quarks are expected to carry most of the nucleon's spin, this observation became known as spin crisis. The availability of polarized beams and targets since the late 1970's has allowed the measurement of the nucleon spin structure functions, and furthermore checks of Quantum Chromodynamics (QCD), the theory of strong interactions, in its perturbative regime. Sum rules involving the spin structure of the nucleon offer an important opportunity to study QCD. It has recently been shown that the GDH sum rule and Bjorken sum rule are both special examples of a more general sum rule that applies to polarized electron scattering off nucleons. This generalized sum rule applies at all Q2. By studying the Q2 evolution of the extended GDH sum, one learns about the transition from quark-like behavior at high Q2, larger than 1 GeV2, to hadronic-like behavior at low Q2, close to 0. The transition between these two regimes is far from understood; it is a key issue in our understanding of the strong interaction. During mid 2003, we measured inclusive polarized cross sections in the scattering of high energy polarized electrons off the Jefferson Lab Hall A polarized 3He target. A strained GaAs photocathode was utilized in the polarized electron gun to provide an electron beam with a polarization of 70%. The high density polarized 3He target, based on optical pumping of rubidium and spin echange, was used as an effective neutron target. The polarization of the target was maintained at about 40% at beam currents as high as 15 muA. The target polarization was measured by Nuclear Magnetic Resonance methods calibrated using two independent techniques: proton thermal polarization (water calibration) and Electron Paramagnetic Resonance (EPR). The relative uncertainty on the target polarization was better than 4%. The target was operated with both longitudinal and transverse target spin orientations. In Jlab Hall A, in order to reach very low Q2 in experiment E97-110, a new septum magnet was used to make very small scattering angle measurements with the Hall A right spectrometer. The left spectrometer was used without a septum to monitor an unpolarized carbon target, downstream of the polarized 3He target, to check for possible false asymmetries. A wide range of data were measured: beam energies from 1.15 to 4.40 GeV were used at scattering angles of 6 and 9 degrees. The invariant mass W ranged across the resonance region, from inelastic threhold to the beginning of the deep inleastic region (W = 2 GeV). From the measured spin-dependent cross sections we extract the 3He spin structure functions g_{1} and g_{2}. Finally, we determined the extended GDH sum and other quantities for the Q2 range between 0.04 and 0.3 GeV2. The range of data allows extrapolation to the real photon point, studying the convergence of the sum rule, determining the slope of GDH sum rule as Q2 to 0 to check Chiral Perturbation Theory, and overlap with the previous higher Q2 experiment E94-010.

Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt: