München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 8: Elektromagnetische und Hadronische Sonden
HK 8.7: Vortrag
Montag, 20. März 2006, 18:00–18:15, F
Measurements of the Neutron Electric Form Factor (Gen) with polarized 3He at MAMI — •Brice Alan Ott — Institut für Physik, Basel, Switzerland — Physikalisches Institut, Tübingen, Germany
Polarized 3He is suitable for using it as polarized neutron target due to its special spin structure. Provided that an appropriate kinematics is chosen, to a large extent both proton spins couple to zero. The best kinematical choice is the region on top of the quasielastic peak where several neutron form factor (Gen) measurements at MAMI were performed. Double polarization experiments with the detection of both the scattered electron and the knocked-out neutron are particularly sensitive to Gen. However, corrections have to be taken into account to extract information about Gen at small Q2, Final State Interactions and Meson Exchange Currents. First preliminary results of Gen at Q2=0.25 and Q2=0.15 (GeV/c)2 will be shown.