Charm and hidden charm scalar mesons in the nuclear medium

TL;DR

This paper investigates how the properties of low-lying charm and hidden charm scalar mesons, specifically D_{s0}(2317) and X(3700), are altered in nuclear matter, revealing significant increases in their widths due to nuclear interactions.

Contribution

It provides a theoretical analysis of the in-medium modifications of charm scalar mesons, highlighting the origin of their increased widths and implications for understanding meson-nucleon interactions.

Findings

Width of D_{s0}(2317) increases to about 100 MeV at nuclear density.

Width of X(3700) increases to about 200 MeV at nuclear density.

Medium modifications offer insights into the nature of scalar resonances.

Abstract

We study the renormalization of the properties of low lying charm and hidden charm scalar mesons in a nuclear medium, concretely of the D_{s0}(2317) and the theoretical hidden charm state X(3700). We find that for the D_{s0}(2317), with negligible width at zero density, the width becomes about 100 MeV at normal nuclear matter density, while in the case of the X(3700) the width becomes as large as 200 MeV. We discuss the origin of this new width and trace it to reactions occurring in the nucleus, while offering a guideline for future experiments testing these changes. We also show how those medium modifications will bring valuable information on the nature of the scalar resonances and the mechanisms of the interaction of D mesons with nucleons and nuclei.