EPJ Web Conf.
Volume 241, 2020The 12th International Workshop on the Physics of Excited Nucleons (NSTAR 2019)
|Number of page(s)||4|
|Published online||22 September 2020|
Measurement of π0π+/- photoproduction off the deuteron and dbutanol targets
on behalf of A2 Collaboration - University of Basel (Basel, CH)
* Corresponding author: email@example.com
Published online: 22 September 2020
Recent experiments using the Crystal Ball/TAPS setup at the MAMI accelerator in Mainz, Germany continue to study the properties and the excitation spectrum of the nucleon with meson photoproduction. Elec tromagnetic excitations of the proton and neutron are essential for understanding their isospin decomposition. The electromagnetic coupling of photons to protons is different than that of neutrons in certain states. Cross section data alone is not sufficient for separating resonances, whereas polarization observables play a crucial role being essential in disentangling the contributing resonant and non-resonant amplitudes. Preliminary results of the polarization observable E of double π production measured with a polarized solid deuterated Butanol target are shown with comparison to predictions of recent analyses.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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