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

被引：10

作者：

Florkowski, W ^{[1
]}

Broniowski, W ^{[1
]}

机构：

[1] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

来源：

NUCLEAR PHYSICS A | 1999年 / 651卷 / 04期

关键词：

in-medium meson correlators; vector mesons; QCD sum rules in nuclear matter; dispersion relations;

D O I：

10.1016/S0375-9474(99)00145-1

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

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. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：397 / 410

页数：14

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