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Phys. Rev. C 60, 055201 (1999) [4 pages]

Invariant mass distributions of the γn→pπ-π0 reaction

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A. Zabrodin1,2, G. Audit2, R. Beck5, A. Braghieri3, N. D’Hose2, S. J. Hall7, J. D. Kellie7, M. MacCormick2, L. Y. Murphy2,6, A. Panzeri3,4, P. Pedroni3 *, T. Pinelli3,4, and G. Tamas2
1Institute for Nuclear Research, 7a, Prospect 60 Let Oktyabrya, RU-117312 Moscow, Russia
2CEA-DAPNIA/SPhN, C.E. Saclay, F-91191 Gif sur Yvette, France
3Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, via Bassi 6, I-27100 Pavia, Italy
4Dipartimento di Fisica Nucleare e Teorica, Università degli Studi di Pavia, via Bassi 6, I-27100 Pavia, Italy
5Institut für Kernphysik, Universität Mainz, D-55099 Mainz, Germany
6The George Washington University, Washington DC 20052
7Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom

Received 18 May 1999; published 27 September 1999

The invariant mass distributions of the γn→pπ-π0 reaction have been determined from a measurement in the photon energy range 500-800 MeV at the MAMI Mainz accelerator with the large acceptance detector DAPHNE and using a deuterium target. At the higher photon energies, the invariant mass spectra of the (π-π0) system show a peak at larger invariant mass values, a signature of a ππ correlated emission in the final state.


©1999 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.60.055201
DOI: 10.1103/PhysRevC.60.055201
PACS: 13.60.Le, 25.20.Lj

* Corresponding author. Electronic address: PEDRONI@ PV.INFN.IT; Telephone: 39 0382 507635; FAX: +39 0382 423241.

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