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26 April 2024

» arxiv » 1107.2151

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Photoproduction of Neutral Pions off Protons
CBELSA/TAPS Collaboration ; V. Crede ; N. Sparks ; A. Wilson ; A.V. Anisovich ; J.C.S. Bacelar ; R. Bantes ; O. Bartholomy ; D. Bayadilov ; R. Beck ; Y.A. Beloglazov ; R. Castelijns ; H. Dutz ; D. Elsner ; R. Ewald ; F. Frommberger ; Chr. Funke ; R. Gregor ; A. Gridnev ; E. Gutz ; W. Hillert ; P. Hoffmeister ; I. Jaegle ; J. Junkersfeld ; H. Kalinowsky ; S. Kammer ; Frank Klein ; Friedrich Klein ; E. Klempt ; M. Kotulla ; B. Krusche ; H. Loehner ; I.V. Lopatin ; S. Lugert ; D. Menze ; T. Mertens ; J.G. Messchendorp ; V. Metag ; M. Nanova ; V.A. Nikonov ; D. Novinski ; R. Novotny ; M. Ostrick ; L.M. Pant ; H. van Pee ; M. Pfeiffer ; A. Roy ; A.V. Sarantsev ; S. Schadmand ; C. Schmidt ; H. Schmieden ; B. Schoch ; S. Shende ; V. Sokhoyan ; A. Suele ; V.V. Sumachev ; T. Szczepanek ; U. Thoma ; D. Trnka ; R. Varma ; D. Walther ; Ch. Wendel ;
Date:	11 Jul 2011
Abstract:	Photoproduction of neutral pions has been studied with the CBELSA/TAPS detector in the reaction $gamma p o ppi^0$ for photon energies between 0.85 and 2.50 GeV. The $pi^0$ mesons are observed in their dominant neutral decay mode: $pi^0 ogammagamma$. For the first time, the differential cross sections cover the very forward region, $ heta_{ m c.m.}<60^circ$. A partial-wave analysis of these data within the Bonn-Gatchina framework observes the high-mass resonances: $G_{17}$(2190), $D_{13}$(2080), and $D_{15}$(2070).
Source:	arXiv, 1107.2151
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