Measurement of the G asymmetry for the γp↦Nπ channels in the Δ(1232) resonance region

J Ahrens,R Kondratiev,J Krimmer,H Dutz,R Beck,H Holvoet,A Braghieri,Th Walcher,T Rostomyan,N Horikawa,F Zapadtka,W Meyer,J R M Annand,A Thomas,T Pinelli,P Grabmayr,K Livingston,G Reicherz,A Panzeri,S Hasegawa,P Pedroni,M Schumacher,E Heid,B Seitz,J C Mcgeorge,B Lannoy,D Ryckbosch,I Preobrajenski,P Jennewein,S Altieri,T Iwata,R Van De Vyver,M Rost,O Jahn,G Rosner,G Tamas,H J Arends ,N D’hose ,Μ Lang ,Luc Van Hoorebeke ,Stefan Goertz

doi:10.1140/epja/i2005-10158-3

Measurement of the G asymmetry for the γp↦Nπ channels in the Δ(1232) resonance region

J Ahrens, R Kondratiev + Show 39 more

https://doi.org/10.1140/epja/i2005-10158-3

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Journal: The European physical journal. A, Hadrons and nuclei	Publication Date: Oct 1, 2005
Citations: 20

Affiliation: Johannes Gutenberg University Mainz, University of Tübingen, University of Bonn, Ghent University, INFN Sezione di Pavia, Nagoya University, University of Göttingen, Ruhr University Bochum, University of Glasgow, University of Pavia, Atomic Energy and Alternative Energies Commission, Direction des énergies, CEA Saclay

#Mainz Microtron MAMI #Tagged Photon Beam + Show 8 more

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Abstract

The G asymmetry of the γp↦Nπ reaction has been measured for the first time for Eγ = 340±14 MeV. This observable, for which very scarce published data exist, plays an important role to disentangle the contributions of the various nucleon resonances. The experiment, performed at the Mainz microtron MAMI, used a 4π-detector system, a linearly polarized, tagged photon beam, and a longitudinally polarized proton target.

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