| Literature DB >> 24116774 |
B S Schlimme1, P Achenbach, C A Ayerbe Gayoso, J C Bernauer, R Böhm, D Bosnar, Th Challand, M O Distler, L Doria, F Fellenberger, H Fonvieille, M Gómez Rodríguez, P Grabmayr, T Hehl, W Heil, D Kiselev, J Krimmer, M Makek, H Merkel, D G Middleton, U Müller, L Nungesser, B A Ott, J Pochodzalla, M Potokar, S Sánchez Majos, M M Sargsian, I Sick, S Sirca, M Weinriefer, M Wendel, C J Yoon.
Abstract
A measurement of beam helicity asymmetries in the reaction 3He[over →](e[over →],e'n)pp is performed at the Mainz Microtron in quasielastic kinematics to determine the electric to magnetic form factor ratio of the neutron GEn/GMn at a four-momentum transfer Q2=1.58 GeV2. Longitudinally polarized electrons are scattered on a highly polarized 3He gas target. The scattered electrons are detected with a high-resolution magnetic spectrometer, and the ejected neutrons are detected with a dedicated neutron detector composed of scintillator bars. To reduce systematic errors, data are taken for four different target polarization orientations allowing the determination of GEn/GMn from a double ratio. We find μnGEn/GMn=0.250±0.058(stat)±0.017(syst).Entities:
Year: 2013 PMID： 24116774 DOI： 10.1103/PhysRevLett.111.132504
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161