Dokumentenart: | Artikel | ||||
---|---|---|---|---|---|
Titel eines Journals oder einer Zeitschrift: | Physical Review D | ||||
Verlag: | AMER PHYSICAL SOC | ||||
Ort der Veröffentlichung: | COLLEGE PK | ||||
Band: | 75 | ||||
Nummer des Zeitschriftenheftes oder des Kapitels: | 1 | ||||
Datum: | 2007 | ||||
Institutionen: | Physik > Institut für Theoretische Physik > Lehrstuhl Professor Schäfer > Arbeitsgruppe Andreas Schäfer | ||||
Identifikationsnummer: |
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Stichwörter / Keywords: | DEEP-INELASTIC-SCATTERING; ELECTRON STORAGE-RING; STRUCTURE FUNCTIONS G(2); HERMES EXPERIMENT; PARTON DISTRIBUTIONS; NUCLEAR-POLARIZATION; MUON SCATTERING; ASYMMETRY A(2); LEADING ORDER; QCD ANALYSIS; | ||||
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: | 69579 |
Zusammenfassung
Precise measurements of the spin structure functions of the proton g(1)(p)(x,Q(2)) and deuteron g(1)(d)(x,Q(2)) are presented over the kinematic range 0.0041 <= x <= 0.9 and 0.18 GeV2 <= Q(2)<= 20 GeV2. The data were collected at the HERMES experiment at DESY, in deep-inelastic scattering of 27.6 GeV longitudinally polarized positrons off longitudinally polarized hydrogen and deuterium gas ...
Zusammenfassung
Precise measurements of the spin structure functions of the proton g(1)(p)(x,Q(2)) and deuteron g(1)(d)(x,Q(2)) are presented over the kinematic range 0.0041 <= x <= 0.9 and 0.18 GeV2 <= Q(2)<= 20 GeV2. The data were collected at the HERMES experiment at DESY, in deep-inelastic scattering of 27.6 GeV longitudinally polarized positrons off longitudinally polarized hydrogen and deuterium gas targets internal to the HERA storage ring. The neutron spin structure function g(1)(n) is extracted by combining proton and deuteron data. The integrals of g(1)(p,d) at Q(2)=5 GeV2 are evaluated over the measured x range. Neglecting any possible contribution to the g(1)(d) integral from the region x <= 0.021, a value of 0.330 +/- 0.011(theo)+/- 0.025(exp)+/- 0.028(evol) is obtained for the flavor-singlet axial charge a(0) in a leading-twist next-to-next-to-leading-order analysis.
Metadaten zuletzt geändert: 19 Dez 2024 14:03