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arXiv · hep-ph/9310225

On Deusons or Deuteronlike Meson-Meson Bound States

Nils A. Törnqvist
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Abstract

The systematics of deuteronlike two-meson bound states, {\it deusons}, is discussed. Previous arguments that many of the present non-$q\bar q$ states are such states are elaborated including, in particular, the tensor potential. For pseudoscalar states the important observation is made that the centrifugal barrier from the P-wave can be overcome by the $1/r^2$ and $1/r^3$ terms of the tensor potential. In the heavy meson sector one-pion exchange alone is strong enough to form at least deuteron-like $B\bar B^*$ and $B^*\bar B^*$ composites bound by approximately 50 MeV, while $D\bar D^*$ and $D^*\bar D^*$ states are expected near the threshold.

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Nils A. Törnqvist. 1993-10-06. On Deusons or Deuteronlike Meson-Meson Bound States. https://doi.org/10.1007/bf02734018

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