Measuring the Phases of GE and GM of the Nucleon
Abstract
The nucleon electromagnetic form factors GE and GM are complex quantities in the time-like region. The absolute values can be determined by measuring the angular distribution of the nucleons in e+ e- --> N N-bar. The complex phase can only be determined by measuring one or more polarizations of the initial or final state. For PEP-N, we can use unpolarized e+ and e- and measure the polarization of one of the outgoing nucleons.
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