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19 April 2024

» pubmed » pmid15600997

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Experimental determination of the evolution of the Bjorken integral at low Q2
A Deur ; P Bosted ; V Burkert ; G Cates ; J-P Chen ; Seonho Choi ; D Crabb ; C W de Jager ; R De Vita ; G E Dodge ; R Fatemi ; T A Forest ; F Garibaldi ; R Gilman ; E W Hughes ; X Jiang ; W Korsch ; S E Kuhn ; W Melnitchouk ; Z-E Meziani ; R Minehart ; A V Skabelin ; K Slifer ; M Taiuti ; J Yun ;
Date:	19 Nov 2004
Journal:	Phys Rev Lett, 93 (21), 212001
Abstract:	We extract the Bjorken integral Gamma1(p-n) in the range 0.17 < Q2 < 1.10 GeV2 from inclusive scattering of polarized electrons by polarized protons, deuterons, and 3He, for the region in which the integral is dominated by nucleon resonances. These data bridge the domains of the hadronic and partonic descriptions of the nucleon. In combination with earlier measurements at higher Q2, we extract the nonsinglet twist-4 matrix element f2.
Source:	PubMed, pmid15600997
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