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arXiv · 2212.00385

Kaon condensation in skyrmion matter and compact stars

Christoph Adam·Alberto García Martín-Caro·Miguel Huidobro·Ricardo Vázquez·Andrzej Wereszczynski
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Abstract

We address the possibility of the appearance of a charged kaon condensate in neutron star cores described within a generalized Skyrme model. Our treatment of strange degrees of freedom is based on the Bound State Approach by Callan and Klebanov, which allows to obtain an in-medium effective potential for the $s$-wave kaon condensate. We predict the onset of kaon condensation at a certain threshold density - whose value depends on the parameters of the model, and ranges between 1.5 and 2.5 times saturation density -, and obtain both the particle fractions and equation of state for dense matter in the kaon condensed phase. Finally, we discuss the effect of such condensates on the mass-radius curves and other observable properties of neutron stars with kaon condensed cores.

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Christoph Adam, Alberto García Martín-Caro, Miguel Huidobro, Ricardo Vázquez, Andrzej Wereszczynski. 2022-12-01. Kaon condensation in skyrmion matter and compact stars. https://doi.org/10.1103/physrevd.107.074007

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