%0 Journal Article
%T phi meson self-energy in nuclear matter from phi N resonant interactions
%A Cabrera, D.
%A Hiller Blin, A. N.
%A Vicente Vacas, M. J.
%J Physical Review C
%D 2017
%V 95
%N 1
%I Amer Physical Soc
%@ 2469-9985
%G English
%F Cabrera_etal2017
%O WOS:000391859600005
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2920), last updated on Thu, 09 Feb 2017 09:52:30 +0000
%X The phi-meson properties in cold nuclear matter are investigated by implementing resonant phi N interactions as described in effective approaches including the unitarization of scattering amplitudes. Several N*-like states are dynamically generated in these models around 2 GeV, in the vicinity of the phi N threshold. We find that both these states and the non-resonant part of the amplitude contribute sizably to the phi collisional self-energy at finite nuclear density. These contributions are of a similar strength as the widely studied medium effects from the KK cloud. Depending on model details (position of the resonances and strength of the coupling to phi N) we report a phi broadening up to about 40-50 MeV, to be added to the phi -> KK in-medium decay width, and an attractive optical potential at threshold up to about 35 MeV at normal matter density. The phi spectral function develops a double peak structure as a consequence of the mixing of resonance-hole modes with the phi quasiparticle peak. The former results point in the direction of making up for missing absorption as reported in phi nuclear production experiments.
%R 10.1103/PhysRevC.95.015201
%U http://arxiv.org/abs/1609.03880
%U https://doi.org/10.1103/PhysRevC.95.015201
%P 015201-9pp