Measurement of the helicity-dependent total cross-section for the γ n → p π− π0 reaction

Ahrens, Jürgen; Altieri, S.; Annand, J. R. M.; Arends, Hans-Jürgen; Beck, R.; Blackston, M. A.; Bradtke, C.; Braghieri, A.; Dutz, H.; Fix, A.; Heid, E.; Hose, N. d&#039; 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, Ch.; Rosner, G.; Rostomyan, T.; Ryckbosch, D.; Tamas, G.; Thomas, Andreas; Weller, H. R.

Measurement of the helicity-dependent total cross-section for the γ n → p π− π0 reaction

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

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Last time updated on 07/05/2019