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Phys. Rev. C 55, R1617 - R1620 (1997)

Total cross section measurement of the γn→pπ-π0 reaction

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A. Zabrodin1,2, G. Audit2, R. Beck5, A. Braghieri3, N. D’Hose2, B. Dolbilkin1, S. J. Hall7, V. Isbert5, L. Y. Murphy2,6, P. Pedroni3, T. Pinelli3,4, G. Tamas2, and S. Wartenberg5
1Institute for Nuclear Research, 7a, Prospect 60 Let Oktyabrya, 117312, Moscow, Russia
2CEA-DAPNIA/SPhN, C.E. Saclay, 91191 Gif sur Yvette, France
3Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, via Bassi 6, 27100 Pavia, Italy
4Dipartimento di Fisica Nucleare e Teorica, Università degli Studi di Pavia, via Bassi 6, 27100 Pavia, Italy
5Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
6The George Washington University, Washington, D.C.
7Department of Physics and Astronomy, University of Glasgow, United Kingdom

Rapid Communication Received 13 December 1996

The total cross section for the γn→pπ-π0 reaction has been measured over the photon energy range 450–800 MeV at the 855 MeV MAMI Microtron in Mainz with the large acceptance detector DAPHNE and using a deuterium target. As expected, this reaction has a very similar cross section to the γp→nπ+π0 channel and its amplitude is strongly underestimated by the existing double pion photoproduction models.


©1997 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.55.R1617
DOI: 10.1103/PhysRevC.55.R1617
PACS: 13.60.Le, 25.20.Lj

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