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D mesons in matter and the in-medium properties of charmonium

Bengt Friman·Su Houng Lee·Taesoo Song
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Abstract

We study the changes in the partial decay widths of excited charmonium states into $D \bar{D}$, when the D meson mass decreases in nuclear matter, taking the internal structure of the hadrons into account. Calculations within the 3P0 model for $ψ(3686)$ and $ψ(3770)$ imply that naive estimates of the in-medium widths based only on phase space are grossly exaggerated. Due to nodes in the wave functions, these states may even become narrow at high densities, if the D meson mass is decreased by about 200 MeV. For the $χ$ states, we generally expect stronger modifications of the widths. The relevance of the $χ$ widths for $J/ψ$ suppression in heavy ion collision is discussed. These phenomena could be explored in experiments at the future accelerator facility at GSI.

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Bengt Friman, Su Houng Lee, Taesoo Song. 2002-09-19. D mesons in matter and the in-medium properties of charmonium. https://doi.org/10.1016/s0370-2693(02)02855-1

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