Spectral change of sigma and omega mesons in a dense nuclear medium

Abstract

The spectra of the scalar ($\sigma$) and vector ($\omega$) mesons in nuclear matter are studied in detail using the quark-meson coupling (QMC) model. It is shown that above normal nuclear matter density the effects of $\sigma$-$\omega$ mixing and the decay of the $\sigma$ into $2\pi$ change the spectra of $\sigma$ and $\omega$ mesons considerably. As in Quantum Hadrodynamics we find a remarkable spectral change in the $\sigma$ meson and the longitudinal mode of the $\omega$ meson, namely a two-peak structure.

14 pages + 9 ps files for 4 figs. The paper was revised, and accepted for publication in Physics Letters B

References in corpus (5)

• Current correlation functions, QCD sum rules and vector mesons in baryonic matter
• Optimized Perturbation Theory at Finite Temperature
• In-medium electron-nucleon scattering
• Sigma and omega meson propagation in a dense nuclear medium
• Lattice Gauge Theory Simulations at Nonzero Chemical Potential in the Chiral Limit

Cited by in corpus (7)

• Properties of charmed and bottom hadrons in nuclear matter: A plausible study
• ${\Lambda }_c^{+}$- and ${\Lambda }_b$-hypernuclei
• ${\Lambda }_c^{+}$, ${\Sigma }_c$, ${\Xi }_c$ and ${\Lambda }_b$ hypernuclei in the quark-meson coupling model
• Decay of a scalar $\sigma$-meson near the critical end-point in the PNJL model
• Self-consistent quantum effects in the quark meson coupling model
• Effect of bound nucleon internal structure change on nuclear structure functions
• Scalar and vector meson propagation in asymmetric nuclear matter