1. Measurement of the neutron spin structure function g(1)(n) with a polarized He-3 internal target
- Author
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Ackerstaff, K., Airapetian, A., Akushevich, I., Akopov, N., Amarian, M., Aschenauer, E.C., Avakian, R., Avakian, H., Avetissian, A., Bains, B., Barrow, S., Beckmann, M., Belostotski, S., Belz, J.E., Benisch, T., Bernreuther, S., Bianchi, N., Blanchard, S., Blouw, J., Bottcher, H., Borissov, A., Brack, J., Braun, B., Bray, B., Bruckner, W., Brull, A., Bruins, E.E.W., Bulten, H.J., Capitani, G.P., Carter, P., Cisbani, E., Court, G.R., Delheij, P.P.J., Devitsin, E., deJager, C.W., DeSanctis, E., DeSchepper, D., Huberts, P.K.A.D., Duren, M., Dvoredsky, A., Elbakian, G., Emerson, J., Fantoni, A., Fechtchenko, A., Ferstl, M., Fick, D., Fiedler, K., Filippone, B.W., Fischer, H., and Fortune, H.T.
- Subjects
DEEP-INELASTIC-SCATTERING ,NUCLEI ,ASYMMETRY ,LEPTONS ,LASER ,PRECISION-MEASUREMENT ,PROTON ,SUM-RULE ,DEUTERON ,STRUCTURE-FUNCTION G1(X) - Abstract
Results are reported from the HERMES experiment at HERA on a measurement of the neutron spin structure function g(1)(n)(x, Q(2)) in deep inelastic scattering using 27.5 GeV longitudinally polarized positrons incident on a polarized He-3 internal gas target. The data cover the kinematic range 0.023 < x < 0.6 and 1 (GeV/c)(2) < Q(2) < 15 (GeV/c)(2). The integral integral(0.023)(0.16)g(1)(n)(x) dx evaluated at a fixed Q(2) of 2.5 (GeV/c)(2) is -0.034+/-0.013(stat.)+/-0.005(syst.). Assuming Regge behavior at low x, the first moment Gamma(1)(n) = integral(0)(1)g(1)(n)(x) dx is -0.037+/-0.013(stat.)+/-0.005(syst.)+/-0.006(extrapol.). (C) 1997 Published by Elsevier Science B.V.
- Published
- 1997