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Measurement of the Neutron Electric to Magnetic Form Factor Ratio at Q2=1.58  GeV2 Using the Reaction 3He⃗(e⃗, e′n)pp (CROSBI ID 197347)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Schlimme, B.S. ; Achenbach, P. ; Ayerbe Gayoso, C. ; Bernauer, J.C. ; Böhm, R. ; Bosnar, Damir ; Challand, Th. ; Distler, M.O. ; Doria, L. ; Fellenberger, F. et al. Measurement of the Neutron Electric to Magnetic Form Factor Ratio at Q2=1.58  GeV2 Using the Reaction 3He⃗(e⃗, e′n)pp // Physical review letters, 111 (2013), 132504-1-132504-5. doi: 10.1103/PhysRevLett.111.132504

Podaci o odgovornosti

Schlimme, B.S. ; Achenbach, P. ; Ayerbe Gayoso, C. ; Bernauer, J.C. ; Böhm, R. ; Bosnar, Damir ; Challand, Th. ; Distler, M.O. ; Doria, L. ; Fellenberger, F. ; Fonvieille, H. ; Gómez Rodríguez, M. ; Grabmayr, P. ; Hehl, T. ; Heil, W. ; Kiselev, D. ; Krimmer, J. ; Makek, Mihael ; Merkel, H. ; Middleton, D.G. ; Müller, U. ; Nungesser, L. ; Ott, B.A. ; Pochodzalla, J. ; Potokar, M. ; Sánchez Majos, S. ; Sargsian, M.M. ; Sick, I. ; Širca, S. ; Weinriefer, M. ; Wendel, M. ; Yoon, C.J.

engleski

Measurement of the Neutron Electric to Magnetic Form Factor Ratio at Q2=1.58  GeV2 Using the Reaction 3He⃗(e⃗, e′n)pp

A measurement of beam helicity asymmetries in the reaction 3He⃗(e⃗, 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).

electromagnetic form factors; protons and neutrons; elastic electron scattering

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Podaci o izdanju

111

2013.

132504-1-132504-5

objavljeno

0031-9007

10.1103/PhysRevLett.111.132504

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Fizika

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