Nuclear medium effects on the $\bar K^*$ meson

Details Nuclear medium effects on the $\bar K^*$ meson Nuclear medium effects on the $\bar K^*$ meson

2011-11-24

arxiv.org/abs/1111.5763v1

Physics

Nuclear Physics

Nuclear Theory

11 pages, 5 figures, contribution based on the invited talk at ECT* Workshop "Strange Hadronic Matter", September 26-30, 2011

Scientific paper

The $\bar K^*$ meson in dense matter is analyzed by means of a unitary approach in coupled channels based on the local hidden gauge formalism. The $\bar K^*$ self-energy and the corresponding $\bar K^*$ spectral function in the nuclear medium are obtained. We observe that the $\bar K^*$ develops a width in matter up to five times bigger than in free space. We also estimate the transparency ratio of the $\gamma A \to K^+ K^{*-} A^\prime$ reaction. This ratio is an excellent tool to detect experimentally modifications of the $\bar K^*$ meson in dense matter.

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