In-medium modification and decay asymmetry of omega mesons in cold nuclear matter

TL;DR

This paper investigates how the decay asymmetry of omega mesons in cold nuclear matter reveals information about their in-medium modifications, offering a new method to study meson properties in nuclear environments.

Contribution

It introduces the concept of decay asymmetry as a sensitive probe for omega meson self-energy and in-medium modifications in nuclear matter.

Findings

Decay asymmetry depends non-trivially on omega energy and momentum.

Asymmetry can serve as a tool to study omega meson properties in nuclear medium.

The approach links decay asymmetry to meson self-energy characteristics.

Abstract

We discuss an asymmetry of the decay $\omega->e^+e^-$ in nuclear matter with respect to the electron and positron energies. This asymmetry is sensitive to the properties of the $\omega$ meson self-energy and, in particular, it has a non-trivial dependence on the $\omega$ energy and momentum. Therefore, this asymmetry may serve as a powerful tool in studying the properties of the $\omega$ meson in the nuclear medium.