A measurement of the proton spin structure function g1p(x,Q2) in deep-inelastic scattering is presented. The data were taken with the 27.6 GeV longitudinally polarised positron beam at HERA incident on a longitudinally polarised pure hydrogen gas target internal to the storage ring. The kinematic range is 0.021 < x < 0.85 and 0.8 GeV2 < Q2 < 20 GeV2. The integral 0.0210.85(x) dx evaluated at Q02 of 2.5 GeV2 is 0.122 ± 0.003(stat.) ± 0.010(syst).
|Number of pages||9|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Dec 3 1998|
Bibliographical noteFunding Information:
We gratefully acknowledge the DESY management for its support and the DESY staff and the staffs of the collaborating institutions. This work was supported by the FWO-Flanders, Belgium; the Natural Sciences and Engineering Research Council of Canada; the INTAS, HCM, and TMR network contributions from the European Community; the German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie; the Deutscher Akademischer Austauschdienst (DAAD); the Italian Istituto Nazionale di Fisica Nucleare (INFN); Monbusho, JSPS, and Toray Science Foundation of Japan; the Dutch Foundation for Fundamenteel Onderzoek der Materie (FOM); the U.K. Particle Physics and Astronomy Research Council; and the U.S. Department of Energy and National Science Foundation.
ASJC Scopus subject areas
- Nuclear and High Energy Physics