Theory of time-like baryon form factors near thresholds

Details Theory of time-like baryon form factors near thresholds Theory of time-like baryon form factors near thresholds

2011-12-07

arxiv.org/abs/1112.1533v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages,4 figures

Scientific paper

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: $\psi(4S)$ for $\Lambda^+_c \Lambda^-_c, \Upsilon (6S)$ for $\Lambda_b \bar \Lambda_b$. An admixture of intermediate $D$- wave resonances produces angular dependence in differential cross section and can explain unusual behavior of the ratio $G_E/G_M$ for the proton.

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