Evidence for a parity doublet Delta(1920)P33 and Delta(1940)D33 from gammap-->ppi;{0}eta.
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.
Horn
I
I
Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany.
Anisovich
A V
AV
Anton
G
G
Bantes
R
R
Bartholomy
O
O
Beck
R
R
Beloglazov
Yu
Y
Bogendörfer
R
R
Castelijns
R
R
Crede
V
V
Ehmanns
A
A
Ernst
J
J
Fabry
I
I
Flemming
H
H
Fösel
A
A
Fuchs
M
M
Funke
Chr
C
Gothe
R
R
Gridnev
A
A
Gutz
E
E
Höffgen
St
S
Hössl
J
J
Junkersfeld
J
J
Kalinowsky
H
H
Klein
F
F
Klempt
E
E
Koch
H
H
Konrad
M
M
Kopf
B
B
Krusche
B
B
Langheinrich
J
J
Löhner
H
H
Lopatin
I
I
Lotz
J
J
Matthäy
H
H
Menze
D
D
Messchendorp
J
J
Metag
V
V
Nikonov
V A
VA
Novinski
D
D
Ostrick
M
M
van Pee
H
H
Sarantsev
A V
AV
Schmidt
C
C
Schmieden
H
H
Schoch
B
B
Suft
G
G
Sumachev
V
V
Szczepanek
T
T
Thoma
U
U
Walther
D
D
Weinheimer
Chr
C