Measurement of the helicity-dependent total cross-section for the gamma n -> p pi(-)pi(0) reaction

Ahrens, J. et al. (2011) Measurement of the helicity-dependent total cross-section for the gamma n -> p pi(-)pi(0) reaction. European Physical Journal A, 47(3), (doi: 10.1140/epja/i2011-11036-1)

Abstract

The helicity dependence of the total cross-section for the gamma n -> p pi(-)pi(0) 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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Protopopescu, Dr Dan and Annand, Dr John
• Authors: Ahrens, J., Altieri, S., Annand, J.R.M., Arends, H. -J., Beck, R., Blackston, M.A., Bradtke, C., Braghieri, A., d'Hose, N., Dutz, H., Fix, A., Heid, E., Jahn, O., Klein, F., Kondratiev, R., Lang, M., Lisin, V., Martinez-Fabregate, M., McGeorge, J.C., Meyer, W., Panzeri, A., Pedroni, P., Pinelli, T., Protopopescu, D., Reicherz, G., Rohlof, C., Rosner, G., Rostomyan, T., Ryckbosch, D., Tamas, G., Thomas, A., and Weller, H.R.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: European Physical Journal A
• Publisher: Springer
• ISSN: 1434-6001
• ISSN (Online): 1434-601X