Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: In-medium properties of the phi meson with phi N resonant contributions   Nuclear production experiments report missing absorption processes of the
in-medium phi meson. Contributions arising from the K-bar K cloud have already
been widely studied, and therefore we investigate the phi-meson properties in
cold nuclear matter with the additional inclusion of resonant phi N
interactions. Two models are considered which dynamically generate N*-like
states close to the phi N threshold. We find that these states, together with
the non-resonant part of the amplitude, contribute to the phi self-energy with
the same order of magnitude as the K-bar K effects. At non-vanishing nuclear
density, both models lead to an additional in-medium broadening of the phi, up
to around 50 MeV. Furthermore, at least one of the models is compatible with a
mass shift to lower energies of up to 35 MeV at threshold and normal matter
density. Finally, a double-peak structure appears in the spectral function due
to the mixing of resonance-hole modes with the $\phi$ quasi-particle peak.
These results converge into the direction of the experimental findings.

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The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
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The categories of this paper are: eess