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

Source: [Spectral change of sigma and omega mesons in a dense nuclear medium](<https://www.sota2.com/research/paper/68fa24a72c2a3760193a727f>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T09:24:26.405Z

Authors: K. Saito, K. Tsushima, A.W. Thomas

Published: 1998-11-10T00:40:41.000Z

## 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.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/nucl-th/9811031>)

[PDF](<https://arxiv.org/pdf/nucl-th/9811031.pdf>)