Data on I-s and I-c in (gamma)over-right-arrowp -< p pi(0)pi(0) reveal cascade decays of N(1900) via N(1520)pi

Sokhoyan, V. and Gutz, E. 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. and Castelijns, R. and Crede, V. and Dutz, H. and Elsner, D. and Ewald, R. and Frommberger, F. and Fuchs, M. and Funke, Ch. and Gregor, R. and Gridnev, A. 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. and Lugert, S. and Mertens, T. and Messchendorp, J. G. and Metag, V. and Nanova, M. and Nikonov, V. A. and Novinski, 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 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) Data on I-s and I-c in (gamma)over-right-arrowp -< p pi(0)pi(0) reveal cascade decays of N(1900) via N(1520)pi. Physics letters. B, 746. pp. 127-131.

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Photoproduction of two neutral pions off the proton is studied using linearly polarized photons, and the polarization observables I-s and I-c are measured for the first time. These two observables are unique to multi-meson final states; they characterize correlations between the linear photon polarization and the direction of outgoing single particles in photoproduction of three-body final states. The I-s and I-c distributions suggest that, in the 1.8 to 2.0 GeV mass region, the N(1520) 3/2(-)pi intermediate state is reached with reaction dynamics consistent with a dominant J(P) = 3/2(+) wave. These data are included in the Bonn-Gatchina (BnGa) partial wave analysis which is based on a large variety of data; the analysis confirms a significant contribution from the reaction chain gamma p -&gt; N(1900)3/2(+) -&gt; N(1520)3/2(-)pi(0) -&gt; p pi(0)pi(0). (C) 2015 The Authors. Published by Elsevier B.V.
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
Publisher:Elsevier B.V.
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:30 Jun 2016 11:01
Deposited On:03 May 2016 14:33

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