QCD sum rule description of nucleons in asymmetric nuclear matter
E. G. DrukarevPetersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188300, RussiaM. G. RyskinPetersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188300, RussiaV. A. SadovnikovaPetersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188300, Russia
2004en
ABI
Abstract
We calculate the nucleon parameters in isospin asymmetric nuclear matter using the QCD sum rules. The nucleon self-energies ${\ensuremath{\Sigma}}_{v}$ and ${\ensuremath{\Sigma}}_{s}^{*}$ are expressed in terms of the in-medium values of QCD condensates. Simple approximate expressions for the self-energies are obtained in terms of these condensates. The relation between successive inclusion of the condensates and meson-exchange picture of the nucleon interaction with medium is analyzed. The values of the self-energies and symmetry energy agree with those obtained by the methods of nuclear physics.
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