QCD sum rules and electromagnetic polari
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Tetsuo Nishikawa; Sakae Saito; Yoshihiko Kondo
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Article
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1997
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Elsevier Science
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English
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We investigate the electromagnetic polarizabilities of a nucleon using the method of QCD sum rules. The diagrams in the operator product expansion are taken into account up to dimension 6. We find that the polarizabilities of a nucleon can be expressed by means of three new kinds of susceptibilities