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(K)over-bar* mesons in dense matter
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We study the properties of (K) over bar* mesons in nuclear matter using a unitary approach in coupled channels within the framework of the local hidden gauge formalism and incorporating the (K) over bar pi decay channel in matter. The in-medium (K) over bar *N interaction accounts for Pauli blocking effects and incorporates the (K) over bar* self-energy in a self-consistent manner. We also obtain the (K) over bar* (off-shell) spectral function and analyze its behavior at finite density and momentum. At a normal nuclear matter density, the (K) over bar* meson feels a moderately attractive potential, while the (K) over bar* width becomes five times larger than in free space. We estimate the transparency ratio of the gamma A -> K+K*(-) A` reaction, which we propose as a feasible scenario at the present facilities to detect changes in the properties of the (K) over bar* meson in nuclear medium.
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TOLÓS RIGUEIRO, Laura, et al. (K)over-bar* mesons in dense matter. Physical Review C. 2010. Vol. 82, num. 4, pags. 045210-1-045210-12. [consulted: 13 of August of 2026]. Available at: https://hdl.handle.net/2445/15242