Electromagnetic form factors of nucleons with QCD constraints: Systematic study of space- and time-like regions

PHYSICAL REVIEW C(2010)

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摘要
Elastic electromagnetic form factors of nucleons are investigated for both the time-like and the space-like momenta by using the unsubtracted dispersion relation with QCD constraints. It is shown that the calculated form factors reproduce the experimental data reasonably well; they agree with recent experimental data for the neutron magnetic form factors for the space-like data obtained by the CLAS Collaboration and are compatible with the ratio of the electric and magnetic form factors for the time-like momentum obtained by the BABAR Collaboration.
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关键词
quantum chromodynamics,form factor,dispersion relation
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