2001/02/28 by S. Mallik, Samir Mallik, Andreas Nyffeler · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevc.63.065204
published as Phys.Rev. C63 (2001) 065204 · 11 pages including 2 figures, Revtex, uses psfig. v2: Some typos corrected, published version
openalex publication_date 2001/05/22 · arxiv created 2001/05/31 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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.