Spin Density Matrix Elements from r0 and p Meson Electroproduction at HERMES

Spin Density Matrix Elements from r0 and p Meson Electroproduction at HERMES

Exclusive production of r0 and p mesons on hydrogen and deuterium targets is studied in the HERMES kinematic region 1 < Q2 < 7 GeV2 and 3.0 < W < 6.3 GeV. Spin density matrix elements are presented. Violation of s-Channel Helicity Conservation is observed through several non-zero values...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Diffraction 2008: International Workshop Diffraction in High Energy Physics (AIP Conference Proceedings Volume 1105) 2009-01, Vol.1105, p.19-23
1. Verfasser: Borissov, A
Format: Artikel
Sprache:eng
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Exclusive production of r0 and p mesons on hydrogen and deuterium targets is studied in the HERMES kinematic region 1 < Q2 < 7 GeV2 and 3.0 < W < 6.3 GeV. Spin density matrix elements are presented. Violation of s-Channel Helicity Conservation is observed through several non-zero values of SDMEs for r0, but not for p. In exclusive r0 production on the proton an indication is observed of a contribution of unnatural-parity exchange amplitudes, for which the dependence on Q2 and t[ is shown.
ISSN:0094-243X
DOI:10.1063/1.3122173