Effect of nucleon structure variation on the longitudinal response function

Abstract

Using the quark-meson coupling (QMC) model, we study the longitudinal response function for quasielastic electron scattering from nuclear matter. In QMC the coupling constant between the scalar ($\sigma$) meson and the nucleon is expected to decrease with increasing nuclear density, because of the self-consistent modification of the structure of the nucleon. The reduction of the coupling constant then leads to a smaller contribution from relativistic RPA than in the Walecka model. However, since the electromagnetic form factors of the in-medium nucleon are modified at the same time, the longitudinal response function and the Coulomb sum are reduced by a total of about 20% in comparison with the Hartree contribution. We find that the relativistic RPA and the nucleon structure variation both contribute about fifty-fifty to the reduction of the longitudinal response.

14 pages, including 3 ps files

References in corpus (3)

• In-medium electron-nucleon scattering
• Sigma and omega meson propagation in a dense nuclear medium
• Critical analysis of quark-meson coupling models for nuclear matter and finite nuclei

Cited by in corpus (14)

• Nucleon-Nucleon Correlations, Short-lived Excitations, and the Quarks Within
• Nucleon and hadron structure changes in the nuclear medium and impact on observables
• Quark-Meson-Coupling (QMC) model for finite nuclei, nuclear matter and beyond
• Properties of charmed and bottom hadrons in nuclear matter: A plausible study
• Is the Coulomb sum rule violated in nuclei?
• ${\Lambda }_c^{+}$- and ${\Lambda }_b$-hypernuclei
• ${\Lambda }_c^{+}$, ${\Sigma }_c$, ${\Xi }_c$ and ${\Lambda }_b$ hypernuclei in the quark-meson coupling model
• Relativistic and Nuclear Medium Effects on the Coulomb Sum Rule
• Medium Modifications of Hadron Properties and Partonic Processes
• Effect of the bound nucleon form factors on charged-current neutrino-nucleus scattering
• Asymmetry in the neutrino and anti-neutrino reactions in a nuclear medium
• Coulomb Distortion in Quasielastic $(e,e^{\prime })$ Scattering on Nuclei: Effective Momentum Approximation and Beyond
• QCD and a New Paradigm for Nuclear Structure
• Effect of bound nucleon internal structure change on nuclear structure functions