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Subtracted dispersion relations for in-medium meson correlators in QCD sum rules

✍ Scribed by Wojciech Florkowski; Wojciech Broniowski

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 620 KB
Volume: 651
Category: Article
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(99)00145-1

No coin nor oath required. For personal study only.

✦ Synopsis

We analyze subtracted dispersion relations for meson correlators at finite baryon density and temperature. Such relations are needed for QCD sum rules. We point out the importance of scattering terms, as well as finite, well-defined subtraction constants. Both are necessary for consistency, in particular for the equality of the longitudinal and transverse correlators in the limit of vanishing three-momentum of mesons relative to the medium. We present detailed calculations in various mesonic channels for the case of the Fermi gas of nucleons.

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