Dokumentenart: | Artikel | ||||
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Titel eines Journals oder einer Zeitschrift: | Physics Letters B | ||||
Verlag: | ELSEVIER SCIENCE BV | ||||
Ort der Veröffentlichung: | AMSTERDAM | ||||
Band: | 494 | ||||
Nummer des Zeitschriftenheftes oder des Kapitels: | 1-2 | ||||
Seitenbereich: | S. 1-8 | ||||
Datum: | 2000 | ||||
Institutionen: | Physik > Institut für Theoretische Physik > Lehrstuhl Professor Schäfer > Arbeitsgruppe Andreas Schäfer | ||||
Identifikationsnummer: |
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Stichwörter / 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 | ||||
Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 530 Physik | ||||
Status: | Veröffentlicht | ||||
Begutachtet: | Ja, diese Version wurde begutachtet | ||||
An der Universität Regensburg entstanden: | Ja | ||||
Dokumenten-ID: | 74014 |
Zusammenfassung
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 ...
Zusammenfassung
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.
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