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)
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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