PoS - Proceedings of Science
Volume 310 - XVII International Conference on Hadron Spectroscopy and Structure (Hadron2017) - Session 7: Hadrons in matter including hypernuclei
$\phi$ meson in nuclear matter and nuclei
J. Cobos Martinez*, K. Tsushima, G. Krein and A. Thomas
Full text: pdf
Pre-published on: February 16, 2018
Published on: March 20, 2018
Abstract
The mass and decay width of the $\phi$ meson in cold nuclear matter are computed in an effective Lagrangian approach, with the medium
dependence of these properties obtained by evaluating
kaon-antikaon loop contributions to the $\phi$ self-energy.
At normal nuclear matter density, we find a downward shift of the $\phi$ mass by a few percent, while the decay width is enhanced by an order of magnitude. We also present $\phi$--nucleus bound state energies and absorption widths for some selected nuclei, using complex optical potentials obtained in the local density approximation. Our results suggest that the $\phi$ should form
bound states with all the nuclei considered. However, the identification of the signal for these predicted bound states will need careful investigation because of their sizable absorption widths.
DOI: https://doi.org/10.22323/1.310.0209
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