QCD sum rules for rho mesons in nuclear matter

Details QCD sum rules for rho mesons in nuclear matter QCD sum rules for rho mesons in nuclear matter

2001-02-06

arxiv.org/abs/hep-ph/0102062v2

Phys.Rev. C63 (2001) 065204

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages including 2 figures, Revtex, uses psfig. v2: Some typos corrected, published version

Scientific paper

10.1103/PhysRevC.63.065204

We investigate QCD sum rules for vector currents in the rho meson channel in the nuclear medium. For increased sensitivity, we subtract out the vacuum contributions. With a saturation scheme often considered in the literature, we find these subtracted sum rules to be unstable. It indicates the importance of other contributions neglected in the saturation scheme. These include more Landau singularities at low energy, additional operators in the medium, and possibly the in-medium width of the rho meson.

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