Kaons and pions in strange quark matter

Details Kaons and pions in strange quark matter Kaons and pions in strange quark matter

2001-11-23

arxiv.org/abs/hep-ph/0111301v3

Europhys.Lett. 60 (2002) 356-362

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 3 figures included; revised version, some changes in the discussion

Scientific paper

10.1209/epl/i2002-00272-8

The behavior of kaons and pions in strange quark matter in weak equilibrium, is investigated within the SU(3) Nambu-Jona-Lasinio [NJL] model. This work focuses a region of high densities where the behavior of mesons has not been explored in the framework of this model. It is found that above the density where strange valence quarks appear in the medium, $\rho = 3.8 \rho_0$, a change of behavior of different observables is observed indicating a tendency to the restoration of flavor symmetry. In particular, the splitting between charge multiplets, $K^+, K^-; K^0, {\bar K^0} {and} \pi^+, \pi^-$ decrease and the low energy modes with quantum numbers of $K^-, \bar K^0 {and} \pi^+$, which are excitations of the Fermi sea, are less relevant than for lower densities.

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