Pions in the nuclear medium and Drell-Yan scattering

Abstract

We investigate the modification of the pion-cloud in the nuclear medium and its effect on the nuclear Drell-Yan process. The pion's in-medium self-energy is calculated in a self-consistent delta-hole model, with particle-hole contribution also included. Both the imaginary and real part of the pion's and delta's self-energy are taken into account and related through a dispersion relation assuring causality. The resulting in-medium pion light-cone momentum distribution shows only a slight enhancement compared to the one of the free nucleon. As a consequence the ratio of the cross-section for Drell-Yan scattering on nuclear matter and nucleonic target is close to unity in agreement with experiment.

33 pages, Latex with epsf, figures included, to appear in Phys. Rev. C

Cited by in corpus (8)

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• Exploring the Partonic Structure of Hadrons through the Drell-Yan Process
• Pion weak decay constant at finite density from the instanton vacuum
• Mesonic and Binding Contributions to the Nuclear Drell-Yan Process
• Nuclear medium effects in Drell-Yan process
• Pions in isospin asymmetric matter and nuclear Drell-Yan scattering
• Nuclear Drell-Yan effect in a covariant model