Measurement of the helicity-dependent total cross-section for the γn → pπ-π0 reaction

J. Ahrens, S. Altieri, J. R.M. Annand, H. J. Arends, R. Beck, M. A. Blackston, C. Bradtke, A. Braghieri, N. d'Hose, H. Dutz, A. Fix, E. Heid, O. Jahn, F. Klein, R. Kondratiev, M. Lang, V. Lisin, M. Martinez-Fabregate, J. C. McGeorge, W. MeyerA. Panzeri, P. Pedroni, T. Pinelli, D. Protopopescu, G. Reicherz, C. Rohlof, G. Rosner, T. Rostomyan, D. Ryckbosch, G. Tamas, A. Thomas, H. R. Weller

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6 Citations (Scopus)

Abstract

The helicity dependence of the total cross-section for the γn → pπ-π0 reaction has been measured for the first time at incident photon energies from 450 to 800MeV. The measurement was performed with the large-acceptance detector DAPHNE at the tagged photon beam facility of the MAMI accelerator in Mainz. Both the measured unpolarized and the helicity-dependent observables are not well described by the existing theoretical models.

Original languageEnglish
Article number36
Pages (from-to)1-8
Number of pages8
JournalEuropean Physical Journal A
Volume47
Issue number3
DOIs
Publication statusPublished - 2011
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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