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19 April 2024

» pubmed » pmid14753931

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Q2 evolution of the neutron spin structure moments using a 3He target
M Amarian ; L Auerbach ; T Averett ; J Berthot ; P Bertin ; B Bertozzi ; T Black ; E Brash ; D Brown ; E Burtin ; J Calarco ; G Cates ; Z Chai ; J-P Chen ; Seonho Choi ; E Chudakov ; E Cisbani ; C W De Jager ; A Deur ; R DiSalvo ; S Dieterich ; P Djawotho ; M Finn ; K Fissum ; H Fonvieille ; S Frullani ; H Gao ; J Gao ; F Garibaldi ; A Gasparian ; S Gilad ; R Gilman ; A Glamazdin ; C Glashausser ; E Goldberg ; J Gomez ; V Gorbenko ; J-O Hansen ; B Hersman ; R Holmes ; G M Huber ; E Hughes ; B Humensky ; S Incerti ; M Iodice ; S Jensen ; X Jiang ; C Jones ; G Jones ; M Jones ; C Jutier ; A Ketikyan ; I Kominis ; W Korsch ; K Kramer ; K Kumar ; G Kumbartzki ; M Kuss ; E Lakuriqi ; G Laveissiere ; J Lerose ; M Liang ; N Liyanage ; G Lolos ; S Malov ; J Marroncle ; K McCormick ; R McKeown ; Z-E Meziani ; R Michaels ; J Mitchell ; Z Papandreou ; T Pavlin ; G G Petratos ; D Pripstein ; D Prout ; R Ransome ; Y Roblin ; D Rowntree ; M Rvachev ; F Sabatie ; A Saha ; K Slifer ; P Souder ; T Saito ; S Strauch ; R Suleiman ; K Takahashi ; S Teijiro ; L Todor ; H Tsubota ; H Ueno ; G Urciuoli ; R Van Der Meer ; P Vernin ; H Voskanian ; B Wojtsekhowski ; F Xiong ; W Xu ; J-C Yang ; B Zhang ; P Zolnierczuk ;
Date:	16 Jan 2004
Journal:	Phys Rev Lett, 92 (2), 022301
Abstract:	We have measured the spin structure functions g(1) and g(2) of 3He in a double-spin experiment by inclusively scattering polarized electrons at energies ranging from 0.862 to 5.058 GeV off a polarized 3He target at a 15.5 degrees scattering angle. Excitation energies covered the resonance and the onset of the deep inelastic regions. We have determined for the first time the Q2 evolution of Gamma(1)(Q2)= integral (1)(0)g(1)(x,Q2)dx, Gamma(2)(Q2)= integral (1)(0)g(2)(x,Q2)dx, and d(2)(Q2)= integral (1)(0)x(2)[2g(1)(x,Q2)+3g(2)(x,Q2)]dx for the neutron in the range 0.1< or =Q2< or =0.9 GeV2 with good precision. Gamma(1)(Q2) displays a smooth variation from high to low Q2. The Burkhardt-Cottingham sum rule holds within uncertainties and d(2) is nonzero over the measured range.
Source:	PubMed, pmid14753931
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