First measurement of the helicity dependence of 3He photoreactions in the [formula omitted] resonance region

P Aguar Bartolomé,D Howdle,M Ostrick,B Krusche,T Rostomyan,L.V FilʼKov,M Romaniuk,O Jahn,H Berghäuser,R Kondratiev,I Keshelashvili,R Beck,J Ahrens,A Starostin,M Unverzagt,D Hornidge,M Korolija,F Pheron,J Mancell,M Oberle,P Pedroni,P Drexler,V Metag,A Polonski,B Oussena,J Krimmer,G Rosner,G Giardina,I Supek,V Lisin,S Schumann,B M K Nefkens ,D G Middleton ,Flaviano Rigamonti ,W Heil,I J D Macgregor ,H Ortega,E Heid,S P Kruglov ,K Livingston,D M Manley ,J C Mcgeorge ,H J Arends ,A Braghieri,J R M Annand ,A Mushkarenkov,M Thiel,W J Briscoe ,I Jaeglé ,D I Sober ,D P Watts ,A A Kulbardis ,D I Glazier ,A Thomas,V L Kashevarov ,A Nikolaev,P B Otte ,S Cherepnya ,T C Jude ,D Werthmüller,S Costanza,V Bekrenev,D Hamilton,A Fix,S Prakhov

doi:10.1016/j.physletb.2013.04.057

First measurement of the helicity dependence of 3He photoreactions in the [formula omitted] resonance region

P Aguar Bartolomé, D Howdle + Show 63 more

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https://doi.org/10.1016/j.physletb.2013.04.057

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Journal: Physics Letters B	Publication Date: May 3, 2013
Citations: 10	License type: cc-by

Affiliation: Johannes Gutenberg University Mainz, University of Glasgow, George Washington University, P.N. Lebedev Physical Institute of the Russian Academy of Sciences, University of Giessen, University of Edinburgh, University of Bonn, University of California, Los Angeles, National Research Tomsk State University, Tomsk Polytechnic University, University of Messina, INFN Sezione di Catania, INFN Sezione di Pavia, Petersburg Nuclear Physics Institute

#GDH Integral #Photon Energy Range + Show 8 more

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Abstract

The first measurement of the helicity dependence of the total inclusive 3He photo-absorption cross section and of the partial cross sections for several reaction channels was carried out at MAMI (Mainz) in the photon energy range between 150 and 500 MeV. The experiment used the large acceptance Crystal Ball spectrometer, complemented by charged particle and vertex detectors, a circularly polarised tagged photon beam and a longitudinally polarised high-pressure 3He gas target. The results obtained give information on the GDH integral on 3He and on the neutron and allow an investigation of the modifications of nucleon properties inside 3He.

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