High-statistics study of the reaction gamma p -< p 2 pi(0)

Sokhoyan, V. and Gutz, E. and Crede, V. and van Pee, H. and Anisovich, A. V. and Bacelar, J. C. S. and Bantes, B. and Bartholomy, O. and Bayadilov, D. and Beck, R. and Beloglazov, Y. A. and Castelijns, R. and Dutz, H. and Elsner, D. and Ewald, R. and Frommberger, F. and Fuchs, M. and Funke, Ch. and Gregor, R. and Gridnev, A. B. and Hillert, W. and Hoffmeister, Ph. and Horn, I. and Jaegle, I. and Junkersfeld, J. and Kalinowsky, H. and Kammer, S. and Kleber, V. and Klein, Frank and Klein, Friedrich and Klempt, E. and Kotulla, M. and Krusche, B. and Lang, M. and Lohner, H. and Lopatin, I. V. and Lugert, S. and Mertens, T. and Messchendorp, J. G. and Metag, V. and Metsch, B. and Nanova, M. and Nikonov, V. A. and Novinsky, D. and Novotny, R. and Ostrick, M. and Pant, L. and Pfeiffer, M. and Piontek, D. and Roy, A. and Sarantsev, A. V. and Schmidt, Ch. and Schmieden, H. and Seifen, T. and Shende, S. and Suele, A. and Sumachev, V. V. and Szczepanek, T. and Thiel, A. and Thoma, U. and Trnka, D. and Varma, R. and Walther, D. and Wendel, Ch. and Wilson, A.. (2015) High-statistics study of the reaction gamma p -< p 2 pi(0). The European physical journal A, 51 (8). p. 95.

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The photoproduction of 2 pi(0) mesons off protons was studied with the Crystal Barrel/TAPS experiment at the electron accelerator ELSA. in Bonn. The energy of photons produced.in a radiator was tagged in the energy range from 600 MeV to 2.5 GeV. Differential and total cross sections and p pi(0)pi(0) Dalitz plots are presented. Part of the data was taken with a diamond radiator producing linearly polarized photons, and beam asymmetries were derived. Properties of nucleon and Delta resonances contributing to the p pi(0)7r final state were determined within the Bonn-Gatchina (BnGa) partial-wave analysis. The data presented here allow us to determine branching ratios of nucleon and Delta resonances for their decays into p pi(0)pi(0) via several intermediate states. Most prominent are decays proceeding via Delta(1232)pi, N(1440)1/2(+)pi, N(1520)3/2(-pi), N(1680)5/2(+)pi, but also p f (500), pf(0) (980), and pf(o)(1270) contribute to the reaction.
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:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:30 Jun 2016 11:01
Deposited On:09 May 2016 09:52

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