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

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

Phys Rev Lett ; 101(20): 202002, 2008 Nov 14.

Artículo en Inglés | MEDLINE | ID: mdl-19113330

RESUMEN

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.

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