QCD Sum Rules, Scattering Length and the Vector Mesons in Nuclear Medium

Abstract

Critical examination is made on the relation between the mass shift of vector mesons in nuclear medium and the vector-meson $-$ nucleon scattering length. We give detailed comparison between the QCD sum rule approach by two of the present authors (Phys. Rev. {\bf C46} (1992) R34) and the scattering-length approach by Koike (Phys. Rev. {\bf C51} (1995) 1488). It is shown that the latter approach is mortally flawed both technically and conceptually.

arXiv comment16 pages, latex, 4 figures appended as uu-encoded file

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