Evidence for a parity doublet Delta(1920)P33 and Delta(1940)D33 from gammap-->ppi;{0}eta

I Horn; A V Anisovich; G Anton; R Bantes; O Bartholomy; R Beck; Yu Beloglazov; R Bogendörfer; R Castelijns; V Crede; A Ehmanns; J Ernst; I Fabry; H Flemming; A Fösel; M Fuchs; Chr Funke; R Gothe; A Gridnev; E Gutz; St Höffgen; J Hössl; J Junkersfeld; H Kalinowsky; F Klein; E Klempt; H Koch; M Konrad; B Kopf; B Krusche; J Langheinrich; H Löhner; I Lopatin; J Lotz; H Matthäy; D Menze; J Messchendorp; V Metag; V A Nikonov; D Novinski; M Ostrick; H van Pee; A V Sarantsev; C Schmidt; H Schmieden; B Schoch; G Suft; V Sumachev; T Szczepanek; U Thoma; D Walther; Chr Weinheimer; CB-ELSA Collaboration

doi:10.1103/PhysRevLett.101.202002

Evidence for a parity doublet Delta(1920)P33 and Delta(1940)D33 from gammap-->ppi;{0}eta

Phys Rev Lett. 2008 Nov 14;101(20):202002. doi: 10.1103/PhysRevLett.101.202002. Epub 2008 Nov 12.

Affiliation

¹ Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany.

PMID: 19113330
DOI: 10.1103/PhysRevLett.101.202002

Abstract

Evidence is reported for the existence of a parity doublet of Delta resonances with total angular momentum J=3/2 from photoproduction of the ppi;{0}eta final state. The two parity partners Delta(1920)P33 and Delta(1940)D33 make significant contributions to the reaction. Cascades of resonances into Delta(1232)eta, N(1535)pi, and Na0(980) are clearly observed.