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Download or read book Precision Measurement of the Proton and Deuteron Spin Structure Functions G2 and Asymmetry A2 written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have measured the spin structure functions g2{sup p} and g2{sup d} and the virtual photon asymmetries A2{sup p} and A2{sup d} over the kinematic range 0.02 (less-than or equal to) x (less-than or equal to) 0.8 and 0.7 (less-than or equal to) Q2 (less-than or equal to) 20 GeV2 by scattering 29.1 and 32.3 GeV longitudinally polarized electrons from transversely polarized NH3 and 6LiD targets. Our measured g2 approximately follows the twist-2 Wandzura-Wilczek calculation. The twist-3 reduced matrix elements d2{sup p} and d2(superscript n) are less than two standard deviations from zero. The data are inconsistent with the Burkhardt-Cottingham sum rule if there is no pathological behavior as x --> 0. The Efremov-Leader-Teryaev integral is consistent with zero within our measured kinematic range. The absolute value of A2 is significantly smaller than the A2