Charm and Hidden Charm Scalar Resonances in Nuclear Matter

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 $100\mathrm{MeV}$ and $200\mathrm{MeV}$ 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.

3 pages, 3 figures, to appear in the proceedings of the International Conference on Particles And Nuclei (PANIC08), Eilat, Israel, November 9-14, 2008