Download or read book Precision Measurement of the G1 Neutron Spin Structure Function written by Michael N. Olson and published by . This book was released on 1999 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Precision Measurement of the Neutron Spin Structure Function Using Polarized HE 3 Target written by and published by . This book was released on 2004 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precision Measurement of the Neutron Spin Structure Function written by Piotr A. Zyla and published by . This book was released on 1998 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precision Measurement of the Neutron Spin Dependent Structure Functions written by and published by . This book was released on 1997 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Precision Measurement of the Spin Structure Function G1 x Q2 written by Gregory S. Mitchell and published by . This book was released on 1999 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Precision Measurement of the Neutron Spin Structure Functions Using a Polarized 3He Target written by Todd B. Smith and published by . This book was released on 1998 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pellettier David written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The folder may include clippings, announcements, small exhibition catalogs, and other ephemeral items.
Download or read book Precision Measurement of the Neutron Spin Dependent Structure Functions written by Yury G. Kolomensky and published by . This book was released on 1997 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Precision Measurement of the Neutron Spin Structure Functions Using a Polarized HE 3 Target written by T. Smith and published by . This book was released on 2003 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a precision measurement of the neutron spin dependent structure function, g{sub 1}{sup n}(x). The measurement was made by the E154 collaboration at SLAC using a longitudinally polarized, 48.3 GeV electron beam, and a {sup 3}He target polarized by spin exchange with optically pumped rubidium. A target polarization as high as 50% was achieved. The elements of the experiment which pertain to the polarized {sup 3}He target will be described in detail in this thesis. To achieve a precision measurement, it has been necessary to minimize the systematic error from the uncertainty in the target parameters. All of the parameters of the target have been carefully measured, and the most important parameters of the target have been measured using multiple techniques. The polarization of the target was measured using nuclear magnetic resonance techniques, and has been calibrated using both proton NMR and by measuring the shift of the Rb Zeeman resonance frequency due to the {sup 3}He polarization. The fraction of events which originated in the {sup 3}He, as measured by the spectrometers, has been determined using a physical model of the target and the spectrometers. It was also measured during the experiment using a variable pressure {sup 3}He reference cell in place of the polarized {sup 3}He target. The spin dependent structure function g{sub 1}{sup n}(z) was measured in the Bjorken x range of 0.014
Download or read book Precision Measurement of the Neutron Spin Asymmetries and Spin dependent Structure Functions in the Valence Quark Region written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Latest Results on G1 and G2 at High X written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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(superscript n), in the high-x (valence quark) region are discussed. The up and down quark spin distributions in the nucleon were extracted. A2(superscript n) was also measured in the same experiment. The results were used, in combination with existing data, to extract the second moment of the spin structure function d2(superscript n). Preliminary results on A1{sup p} and A1{sup d} in the high-x region have also become available. Finally, the results of a precision measurement of the g2 structure function to study higher twist effects will be presented.
Download or read book A Precision Measurement of the Neutron D2 written by Matthew Posik and published by . This book was released on 2013 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: The g2 nucleon spin-dependent structure function measured in electron deep inelastic scattering contains information beyond the simple parton model description of the nucleon. It provides insight into quark-gluon correlations and a path to access the confining local color force a struck quark experiences just as it is hit by the virtual photon due to the remnant di-quark. The quantity d2, a measure of this local color force, has its information encoded in an x2 weighted integral of a linear combination of spin structure functions g1 and g2 and thus is dominated by the valence-quark region at large momentum fraction x. To date, theoretical calculations and experimental measurements of the neutron d2 differ by about two standard deviations. Therefore, JLab experiment E06-014, performed in Hall A, made a precision measurement of this quantity. Double spin asymmetries and absolute cross-sections were measured in both DIS and resonance regions by scattering longitudinally polarized electrons at beam energies of 4.74 and 5.89 GeV from a longitudinally and transversely polarized 3He target. Results for the absolute cross-sections and spin structure functions on 3He will be presented in the dissertation, as well as results for the neutron d2 and extracted color forces.
Download or read book Precision Measurement of Neutron Spin Asymmetry A n atop 1 at Large Xbj Using CEBAF at 5 7 GeV written by and published by . This book was released on 2002 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation will first give an introduction to the theories and formalism of polarized deep inelastic scattering and a review of the theories of A$n\atop{1}$. Next the experiment E99-117 at JLab Hall A will be described, followed by the data analysis. The data presented greatly improve the current world fit of neutron polarized structure functions and provide valuable insight in the understanding of the neutron spin structure.
Download or read book Nucleon Spin Structure Functions G1 and G2 from Polarized Inclusive Scattering written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper will present a survey of recent experimental results for the g1 and g2 spin structure functions. Over the past decade, these structure functions (and the virtual photon asymmetries A1 and A2) have been well-measured in the large-Q2 scaling region using inclusive polarized deep-inelastic scattering. New precision results from Jefferson Lab are now becoming available which cover kinematic regions that were previously poorly measured or completely unmeasured. Topics covered will include: recent experiments at Jefferson Lab which have made precise measurements of g1 in the resonance region for both proton and neutron to investigate the Q2 evolution of the GDH sum rule, a new measurement of A1 for the neutron in the large-x region where valence quark dynamics dominate, new precision results for g2 from Jefferson Lab, a review of the g1 results and NLO analyses in the scaling region for the SLAC, HERMES, and SMC data. Finally, a survey of results expected from several new experime.
Download or read book The Spin Structure of the Neutron written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A description of SLAC experiment E154, a precision measurement of the neutron's longitudinal spin structure function g[sub 1][sup n], is presented. Deep inelastic electron scattering was used to measure the structure function in the kinematic range 0.014
Download or read book A Precision Measurement of the Neutron2 Probing the Color Force written by and published by . This book was released on 2014 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: The g2 nucleon spin-dependent structure function measured in electron deep inelastic scattering contains information beyond the simple parton model description of the nucleon. It provides insight into quark-gluon correlations and a path to access the confining local color force a struck quark experiences just as it is hit by the virtual photon due to the remnant di-quark. The quantity d2, a measure of this local color force, has its information encoded in an x2 weighted integral of a linear combination of spin structure functions g1 and g2 and thus is dominated by the valence-quark region at large momentum fraction x. To date, theoretical calculations and experimental measurements of the neutron d2 differ by about two standard deviations. Therefore, JLab experiment E06-014, performed in Hall A, made a precision measurement of this quantity at two mean four momentum transfers values of 3.21 and 4.32 GeV2. Double spin asymmetries and absolute cross-sections were measured in both DIS and resonance regions by scattering longitudinally polarized electrons at beam energies of 4.74 and 5.89 GeV from a longitudinally and transversely polarized 3He target. Results for the absolute cross-sections and spin structure functions on 3He will be presented in the dissertation, as well as results for the neutron d2 and extracted color forces.
Download or read book Precision Measurement of Neutron Spin Asymmetry An1 at Large XBj Using CEBAF at 5 7 GeV written by Xiaochao Zheng and published by . This book was released on 2002 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) Combined with world fit of proton gP1/Ff1 data and the quark distribution ratio d/u, the polarized quark distributions ... have been obtained from gn1/Fn1 data. Results of ... at all three XBj points are negative, in disagreement with the predictions from pQCD based hadron helicity conservation. This dissertation will first give an introduction to the theories and formalism of polarized deep inelastic scattering and a review of the theories of An1. Next the experiment E99-117 at JLAB Hall A will be described, followed by the data analysis which yields results for ... The data presented greatly improve the current world fit of neutron polarized structure functions and provide valuable insight in the understanding of the neutron spin structure.
