Pions in isospin asymmetric matter and nuclear Drell-Yan scattering

Abstract

Using a self-consistent delta-hole model the pion propagation in isospin asymmetric nuclear matter is studied. In neutron-rich matter, corresponding to heavy nuclei, a significant difference in positive and negative pion light-cone distributions is obtained leading to a nuclear enhancement of up antiquark distribution compared to the down antiquark one. This means that the sea-quark asymmetry in the free nucleon cannot be extracted model independently from an experiment on a neutron-rich nucleus.

10 pages, 3 figures (included), Latex 2.09, uses elsart.sty, epsf.sty

References in corpus (3)

• Measurement of the Light Antiquark Flavor Asymmetry in the Nucleon Sea
• Flavor Asymmetry of Antiquark Distributions in the Nucleon
• Pions in the nuclear medium and Drell-Yan scattering

Cited by in corpus (5)

• Isospin-dependent pion in-medium effects on charged pion ratio in heavy ion collisions
• Deep inelastic scattering on asymmetric nuclei
• Medium effects on charged pion ratio in heavy ion collisions
• Nuclear Drell-Yan effect in a covariant model
• Pions in isospin asymmetric nuclei