N* and Δ* decays into Nπ⁰π⁰

Thoma, U. and Fuchs, M. and Anisovich, A. V. and Anton, G. and Bantes, R. and Bartholomy, O. and Beck, R. and Beloglazov, Yu. and Crede, V. and Ehmanns, A. and Ernst, J. and Fabry, I. and Flemming, H. and Foesel, A. and Funke, Chr. and Gothe, R. and Gridnev, A. and Gutz, E. and Hoeffgen, St. and Horn, I. and Hoessl, J. and Junkersfeld, J. and Kalinowsky, H. and Klein, F. and Klempt, E. and Koch, H. and Konrad, M. and Kopf, B. and Krusche, B. and Langheinrich, J. and Loehner, H. and Lopatin, I. and Lotz, J. and Matthaey, H. and Menze, D. and Nikonov, Va. and Novinski, D. and Ostrick, M. and van Pee, H. and Sarantsev, A. V. and Schmidt, C. and Schmieden, H. and Schoch, B. and Suft, G. and Sumachev, V. and Szczepanek, T. and Walther, D. and Weinheimer, Chr.. (2008) N* and Δ* decays into Nπ⁰π⁰. Physics letters. B, Vol. 659, H. 1-2. pp. 87-93.

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Official URL: http://edoc.unibas.ch/dok/A5261925

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Decays of baryon resonances in the second and the third resonance region into N pi(0)pi(0) are studied by photoproduction of two neutral pions off protons. Partial decay widths of N* and Delta* resonances decaying into Delta(1232)pi, N(pi pi)(S), N(1440)P-11 pi, and N(1520)D-13 pi are determined in a partial wave analysis of this data and of data from other reactions. Several partial decay widths were not known before. Interesting decay patterns are observed which are not even qualitatively reproduced by quark model calculations. In the second resonance region, decays into Delta(1232)pi dominate clearly. The N(pi pi)(S)-wave provides a significant contribution to the cross section, especially in the third resonance region. The P-13(1720) properties found here are at clear variance to PDG values.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Note:Variant title: N* and Delta* decays into N pi(0)pi(0) -- Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:54

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