2019 Impact factor 2.176
Hadrons and Nuclei
Eur. Phys. J. A 9, 1-4

Short note

Double- $\mathsf\pi^0$ photoproduction from the deuteron

V. Kleber1 - P. Achenbach1 - J. Ahrens2 - R. Beck2 - V. Hejny1 - J.D. Kellie3 - M. Kotulla1 - B. Krusche1 - V. Kuhr4 - R. Leukel2 - V. Metag1 - R. Novotny1 - V. Olmos de León2 - R.O. Owens3 - F. Rambo4 - A. Schmidt2 - M. Schumacher4 - U. Siodlaczek5 - H. Ströher1 - J. Weiß1 - F. Wissmann4 - M. Wolf1

1 II. Physikalisches Institut, Universität Giessen, D-35392 Giessen, Germany
2 Institut für Kernphysik, Johannes-Gutenberg-Universität Mainz, D-55099 Mainz, Germany
3 Department of Physics and Astronomy, University of Glasgow, Glasgow G128QQ, UK
4 II. Physikalisches Institut, Universität Göttingen, D-37073 Göttingen, Germany
5 Physikalisches Institut, Universität Tübingen, D-72076 Tübingen, Germany

Received: 5 June 2000 / Revised version: 28 August 2000
Communicated by Th. Walcher

Abstract
The photoproduction of two neutral pions from the deuteron has been studied for incident photon energies from 200 MeV to 820 MeV with the TAPS spectrometer at MAMI (Mainz Microtron). The total cross-section was determined and used to deduce the cross-section from the neutron. Due to the good statistical quality of the data Dalitz plots for the three particles in the exit channel ( $\pi^0\pi^0N$) could be constructed. The invariant mass distributions derived from them are presented in this paper. They indicate that the important reaction mechanism in the second resonance region is a sequential decay pattern involving the population of the $\Delta$(1232)-resonance as an intermediate state.

PACS
13.60.Le Meson production - 25.20.Lj Photoproduction reactions


Copyright Società Italiana di Fisica, Springer-Verlag 2000