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Full text not available from this repository. (Request a copy)Abstract
The dependence on Q(2) (the negative square of the 4-momentum of the exchanged virtual photon) of the generalised Gerasimov-Drell-Hearn integral for the proton has been measured in the range 1.2 GeV2 < Q(2) < 12 GeV2 by scattering longitudinally polarised positrons on a longitudinally polarised hydrogen gas target. The contributions of the nucleon-resonance and deep inelastic regions to this integral have been evaluated separately. The latter has been found to dominate for Q(2) > 3 GeV2, while both contributions are important at low Q(2). The total integral shows no significant deviation from a 1/Q(2) behaviour in the measured Q(2) range, and thus no sign of large effects due to either nucleon-resonance excitations or nonleading twist. (C) 2000 Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | POLARIZED STRUCTURE FUNCTIONS; DEEP-INELASTIC SCATTERING; STRUCTURE FUNCTIONS G(1); SUM-RULE; SPIN STRUCTURE; RADIATIVE-CORRECTIONS; MUON SCATTERING; NUCLEON; NEUTRON; PARTICLES; deep inelastic scattering; sum rules; asymmetries; photoabsorption |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Mar 2022 10:14 |
| Last Modified: | 15 Mar 2022 10:14 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42044 |
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