Theory of time-like baryon form factors near thresholds
Abstract
A new mechanism of baryon-antibaryon production via nonperturbative double pair creation in intermediate mesons is proposed and the theory contains no fitting parameters. It is shown, that near-threshold resonances are responsible for enhancements in electroproduction cross sections: (4S) for +c -c, (6S) for b b. An admixture of intermediate D- wave resonances produces angular dependence in differential cross section and can explain unusual behavior of the ratio GE/GM for the proton.
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