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Measurement Of Spin Structure Functions At Low To Moderate Qsup 2 Using Clas
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Book Synopsis Measurement of Spin Structure Functions at Low to Moderate Q{sup 2} Using CLAS. by : CLAS Collaboration
Download or read book Measurement of Spin Structure Functions at Low to Moderate Q{sup 2} Using CLAS. written by CLAS Collaboration and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Spin structure functions of the nucleon in the region of large x and small to moderate Q2 continue to be of high current interest. A large experimental program to measure the spin structure function g1 and its first moment Gamma{sub 1} has been concluded at Jefferson Lab. An overview of the experiment and its kinematic coverage will be discussed. We will also show preliminary results from the 5.7 GeV and the 1.6 GeV data sets.
Book Synopsis Measurement of Spin Structure Functions at Moderate Q{sup 2} Using CLAS. by : Volker Burkert
Download or read book Measurement of Spin Structure Functions at Moderate Q{sup 2} Using CLAS. written by Volker Burkert and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Spin structure functions of the nucleon in the region of large z and small to moderate Q{sup 2} continue to be of high current interest. Among the topics one can study in this kinematic regime are spin-dependent resonance transition amplitudes and their interference with each other and the non-resonant background, the behavior of the asymmetry A{sub 1} at large x, and the presence or absence of local duality in spin structure functions. The first moment of the spin structure function g{sub 1} goes through a rapid transition from the photon point (Q{sup 2} = 0), where it is constrained by the Gerasimov-Drell-Hearn sum rule, to the deep inelastic limit where it is sensitive to the nucleon spin fraction carried by quarks. This opens up the possibility to study the transition from hadronic to quark degrees of freedom over the whole range of Q{sup 2}. Recently, we concluded a large experimental program to measure these observables with polarized proton and deuteron targets at Jefferson Lab. A highly polarized electron beam, solid polarized NH{sub 3} and ND{sub 3} targets and the CEBAF Large Acceptance Spectrometer (CLAS) in Hall B were used to accumulate over 23 billion events with 4 different beam energies of 1.6, 2.5, 4.2 and 5.7 GeV. We present an overview of the experiment, its kinematic coverage and its statistical power. We show final results from the first run at 2.5 GeV and 4 GeV and preliminary results from the 5.7 GeV and the 1.6 GeV data sets.
Book Synopsis Measurement of Spin Structure Functions at Low to Moderate Q2 Using CLAS. by :
Download or read book Measurement of Spin Structure Functions at Low to Moderate Q2 Using CLAS. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Spin structure functions of the nucleon in the region of large x and small to moderate Q2 continue to be of high current interest. A large experimental program to measure the spin structure function g1 and its first moment Gamma1 has been concluded at Jefferson Lab. An overview of the experiment and its kinematic coverage will be discussed. We will also show preliminary results from the 5.7 GeV and the 1.6 GeV data sets.
Book Synopsis Measurement of Spin Structure Functions at Moderate Q2 Using CLAS. by :
Download or read book Measurement of Spin Structure Functions at Moderate Q2 Using CLAS. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Spin structure functions of the nucleon in the region of large z and small to moderate Q2 continue to be of high current interest. Among the topics one can study in this kinematic regime are spin-dependent resonance transition amplitudes and their interference with each other and the non-resonant background, the behavior of the asymmetry A1 at large x, and the presence or absence of local duality in spin structure functions. The first moment of the spin structure function g1 goes through a rapid transition from the photon point (Q2 = 0), where it is constrained by the Gerasimov-Drell-Hearn sum rule, to the deep inelastic limit where it is sensitive to the nucleon spin fraction carried by quarks. This opens up the possibility to study the transition from hadronic to quark degrees of freedom over the whole range of Q2. Recently, we concluded a large experimental program to measure these observables with polarized proton and deuteron targets at Jefferson Lab. A highly polarized electron beam, solid polarized NH3 and ND3 targets and the CEBAF Large Acceptance Spectrometer (CLAS) in Hall B were used to accumulate over 23 billion events with 4 different beam energies of 1.6, 2.5, 4.2 and 5.7 GeV. We present an overview of the experiment, its kinematic coverage and its statistical power. We show final results from the first run at 2.5 GeV and 4 GeV and preliminary results from the 5.7 GeV and the 1.6 GeV data sets.
Download or read book Clemens, Paul Lewis 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.
Book Synopsis Determination of the Effective Strong Coupling Constant $\alpha_{s, G_1}(Q^2)$ from CLAS Spin Structure Function Data by :
Download or read book Determination of the Effective Strong Coupling Constant $\alpha_{s, G_1}(Q^2)$ from CLAS Spin Structure Function Data written by and published by . This book was released on 2008 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a new extraction of the effective strong coupling constant $\alpha_{s, g_1}(Q^2)$. The result agrees with a previous determination and extends the measurement of the low and high $Q^2$ behavior of $\alpha_{s, g_1}(Q^2)$ that was previously deduced from sum rules. In particular, it experimentally verifies the lack of $Q^2$-dependence of $\alpha_{s, g_1}(Q^2)$ in the low $Q^2$ limit. This fact is necessary for application of the AdS/CFT correspondence to QCD calculations. We provide a physics motivated parameterization of $\alpha_{s, g_1}(Q^2)$ that can equivalently be used to parameterize the $Q^2$-dependence of the generalized Gerasimov-Drell-Hearn and Bjorken sums.
Book Synopsis Measurement of the Spin Structure Function G1(x, Q2) of the Proton in the Resonance Region by : Yelena Alexandrovna Prok
Download or read book Measurement of the Spin Structure Function G1(x, Q2) of the Proton in the Resonance Region written by Yelena Alexandrovna Prok and published by . This book was released on 2004 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Precision Measurement of the Spin Structure Function G1(x,Q2) by : Gregory S. Mitchell
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:
Book Synopsis Measurement of the Spin Structure Function G2(x, Q2) for the Proton and Deuteron by : Todd Denson Averett
Download or read book Measurement of the Spin Structure Function G2(x, Q2) for the Proton and Deuteron written by Todd Denson Averett and published by . This book was released on 1995 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Precise Measurement of the Spin Structure Functions G1[p] and G1[d] by : Terrence S. Toole
Download or read book A Precise Measurement of the Spin Structure Functions G1[p] and G1[d] written by Terrence S. Toole and published by . This book was released on 2000 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Extract og Register over Deres Kongelige Majestæters Til Danmark og Norge &c. Forordninger, Forbude, Ordonancer, Fundatzer, Teglements, Laugs-Artikler, Privilegier, Rescripter og Placater, som fra Aaret 1670 til 1768 ere udgangne ved Martinus Nissen written by and published by . This book was released on 1793 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Precision Measurement of the Spin Structure Function G(2)(P). by :
Download or read book A Precision Measurement of the Spin Structure Function G(2)(P). written by and published by . This book was released on 2004 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: The spin structure function g2(x, Q2) and the virtual photon asymmetry A2(x, Q2) were measured for the proton using deep inelastic scattering. The experiment was conducted at the Stanford Linear Accelerator Center (SLAC), where longitudinally polarized electrons at 29.1 and 32.3 GeV were scattered from a transversely polarized NH3 target. Large data sets were accumulated using three independent spectrometers covering a kinematic range 0.02 (less-than or equal to) x (less-than or equal to) 0.8 and 1 (less-than or equal to) Q2 (less-than or equal to) 20 (GeV/c)2. This new data is the first data precise enough to distinguish between current models for the proton. The structure function g2{sup p} was found to be reasonably consistent with the twist-2 Wandzura-Wilczek calculation. The Q2 dependence of g2 approximately follows the Q2 dependence of g2{sup WW}, although the data are not precise enough to rule out no Q2 dependence. The absolute value for A2{sup p} was found to be significantly smaller than the Soffer limit over the measured range. The virtual photon asymmetry A2 was also found to be inconsistent with zero over much of the measured range.
Book Synopsis Measurement of Spin Structure Function G(1) for Proton and Deuteron in the Resonance Region by :
Download or read book Measurement of Spin Structure Function G(1) for Proton and Deuteron in the Resonance Region written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiment E143 at SLAC measured the proton and deuteron spin structure functions g[sub 1][sup p], g[sub 2][sup p], g[sub 1][sup d] and g[sub 2][sup d] using polarized electrons at beam energies of 29, 16, and 9.7 GeV incident on polarized [sup 15]NHY[sub 3] and [sup 15]ND[sub 3] targets. Two spectrometers detected the scattered electrons at the angles 4.5[sup o] and 7.0[sup o], covering a kinematic range of x> 0.03 and 0.3
Book Synopsis A Precision Measurement of the Spin Structure Function G2[superscript P] by : Nawal Benmouna
Download or read book A Precision Measurement of the Spin Structure Function G2[superscript P] written by Nawal Benmouna and published by . This book was released on 2001 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spin Structure Functions at Low Q**2 from JLab Data by :
Download or read book Spin Structure Functions at Low Q**2 from JLab Data written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Spin structure functions of the nucleon in the regionof large x and small to moderate Q^2 continue to be of high current interest. Among the topics one can study in this kinematic regime are the Q^2 evolution of the first moment of g1 and the behavior of the virtual photon asymmetry A1 at large x. A large experimental program to measure these observables for the proton and deuteron has been concluded at Jefferson Lab Hall B. We will present the results of the 1.6 and 5.7 GeV data.
Book Synopsis Tests of Duality in the Spin-Structure Function G_1 by : Wolfgang Korsch
Download or read book Tests of Duality in the Spin-Structure Function G_1 written by Wolfgang Korsch and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Although quark-hadron duality is well established for the spin-independent structure function, F{sub 2}{sup p}, hardly any information is available on the low Q{sup 2} scaling behavior of spin-structure functions. Recent experiments at Jefferson Lab measured the spin-structure function g1 in the nucleon resonance region for variety of targets. Global and local duality was observed for Q{sup 2} values above {approx} 2 (GeV/c){sup 2}.
Book Synopsis Measurements of Spin Structure Function G[p]1 and G[d]1 for Proton and Deuteron at SLAC E143 by : Tingjun Liu
Download or read book Measurements of Spin Structure Function G[p]1 and G[d]1 for Proton and Deuteron at SLAC E143 written by Tingjun Liu and published by . This book was released on 1996 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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