Determination of the deep inelastic contribution to the generalised Gerasimov-Drell-Hearn integral for the proton and neutron


Journal Article

The virtual photon absorption cross section differences [σ 1/2 - σ 3/2 ] for the proton and neutron have been determined from measurements of polarised cross section asymmetries in deep inelastic scattering of 27.5 GeV longitudinally polarised positrons from polarised 1 H and 3 He internal gas targets. The data were collected in the region above the nucleon resonances in the kinematic range v< 23.5 GeV and 0.8 GeV 2 < Q 2 < 12 GeV 2 . For the proton the contribution to the generalised Gerasimov-Drell-Hearn integral was found to be substantial and must be included for an accurate determination of the full integral. Furthermore the data are consistent with a QCD next-to-leading order fit based on previous deep inelastic scattering data. Therefore higher twist effects do not appear significant. © 1998 Elsevier Science B.V. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Ackerstaff, K; Airapetian, A; Akopov, N; Akushevich, I; Amarian, M; Aschenauer, EC; Avakian, H; Avakian, R; Avetissian, A; Bains, B; Barrow, S; Baumgarten, C; Beckmann, M; Belostotski, S; Belz, JE; Benisch, T; Bernreuther, S; Bianchi, N; Blanchard, S; Blouw, J; Böttcher, H; Borissov, A; Brack, J; Brauksiepe, S; Braun, B; Bray, B; Brons, S; Brückner, W; Brüll, A; Bruins, EEW; Bulten, HJ; Cadman, R; Capitani, GP; Carter, P; Chumney, P; Cisbani, E; Court, GR; Dal Piaz, PF; Delheij, PPJ; de Sanctis, E; de Schepper, D; Devitsin, E; de Witt Huberts, PKA; di Nezza, P; Düren, M; Dvoredsky, A; Elbakian, G; Ely, J; Emerson, J; Fantoni, A; Fechtchenko, A; Ferstl, M; Fick, D; Fiedler, K; Filippone, BW; Fischer, H; Fortune, HT; Fox, B; Frabetti, S; Franz, J; Frullani, S; Funk, MA; Gagunashvili, ND; Galumian, P; Gao, H; Gärber, Y; Garibaldi, F; Gavrilov, G; Geiger, P; Gharibyan, V; Gyurjyan, V; Golendoukhin, A; Graw, G; Grebeniouk, O; Green, PW; Greeniaus, LG; Grosshauser, C; Guidal, MG; Gute, A; Haas, JP; Haeberli, W; Hansen, JO; Hasch, D; Häusser, O; Heinsius, FH; Henderson, R; Henkes, T; Henoch, M; Hertenberger, R; Holler, Y; Holt, RJ; Hoprich, W; Ihssen, H; Iodice, M; Izotov, A; Jackson, HE; Jgoun, A; Jones, C; Kaiser, R

Published Date

  • December 24, 1998

Published In

Volume / Issue

  • 444 / 3-4

Start / End Page

  • 531 - 538

International Standard Serial Number (ISSN)

  • 0370-2693

Digital Object Identifier (DOI)

  • 10.1016/S0370-2693(98)01396-3

Citation Source

  • Scopus