Charm and Hidden Charm Scalar Resonances in Nuclear Matter

TL;DR

This paper investigates how scalar charm resonances like D_{s0}(2317), D_0(2400), and X(3700) change their properties in nuclear matter, revealing significant width increases that inform their nature and D meson interactions.

Contribution

It provides the first detailed analysis of the in-medium modifications of scalar charm resonances and proposes experimental tests to explore their nature and D meson interactions.

Findings

Widths of D_{s0}(2317) and X(3700) increase significantly in nuclear matter.

D_0(2400) shows less change in width under similar conditions.

Proposes experimental methods to observe these in-medium modifications.

Abstract

We study the properties of the scalar charm resonances $D_{s0}(2317)$ and $D_0(2400)$, and the theoretical hidden charm state X(3700) in nuclear matter. We find that for the $D_{s0}(2317)$ and X(3700) resonances, with negligible and small width at zero density, respectively, the width becomes about $100 {\rm MeV}$ and $200 {\rm MeV}$ at normal nuclear matter density, accordingly. For $D_0(2400)$ the change in width is relatively less important. We discuss the origin of this new width and trace it to reactions occurring in the nucleus. We also propose a possible experimental test for those modifications in nuclear matter, which will bring valuable information on the nature of those scalar resonances and the interaction of $D$ mesons with nucleons.